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    </picture>
  </region>
  <region id="2" left="504" top="234" width="80" height="33" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">ε</e>
        <e type="operand">10</e>
        <e type="operand">15</e>
        <e type="operator" args="1">-</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="3" left="513" top="279" width="115" height="81" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">data</e>
        <e type="operand">1</e>
        <e type="operand">ε</e>
        <e type="operator" args="2">+</e>
        <e type="operand">4</e>
        <e type="operand">2</e>
        <e type="operand">5</e>
        <e type="operand">3</e>
        <e type="operand">2</e>
        <e type="operand">4</e>
        <e type="operand">3</e>
        <e type="operand">4</e>
        <e type="operand">2</e>
        <e type="function" preserve="true" args="10">mat</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="4" left="45" top="531" width="464" height="31" color="#000000" bgColor="#ff8040" fontSize="14">
    <text lang="eng">
      <p bold="true">Part 1. get the 's' spline coefficients</p>
    </text>
  </region>
  <region id="5" left="621" top="531" width="96" height="26" color="#ffff00" bgColor="#010101" fontSize="10">
    <math decimalPlaces="4">
      <input>
        <e type="operand">t0</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="1">time</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="6" left="45" top="567" width="270" height="140" border="true" color="#000000" bgColor="#ebebeb" fontSize="10">
    <math optimize="2" decimalPlaces="4">
      <input>
        <e type="operand">L</e>
        <e type="operand">H</e>
        <e type="operand">N</e>
        <e type="function" args="3">xd</e>
        <e type="operand" style="string">range discretise</e>
        <e type="operand">U</e>
        <e type="operand">0</e>
        <e type="operator" args="2">:</e>
        <e type="operand">dx</e>
        <e type="operand">H</e>
        <e type="operand">L</e>
        <e type="operator" args="2">-</e>
        <e type="operand">N</e>
        <e type="operator" args="2">/</e>
        <e type="operator" args="2">:</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operand">N</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">range</e>
        <e type="operand">U</e>
        <e type="operand">i</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">L</e>
        <e type="operand">dx</e>
        <e type="operator" args="2">-</e>
        <e type="bracket">(</e>
        <e type="operand">dx</e>
        <e type="operand">i</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">+</e>
        <e type="operator" args="2">:</e>
        <e type="function" preserve="true" args="3">for</e>
        <e type="operand">U</e>
        <e type="operand">5</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="7">line</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="7" left="459" top="567" width="88" height="63" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">L</e>
        <e type="operand">0</e>
        <e type="operator" args="2">:</e>
        <e type="operand">H</e>
        <e type="operand">5</e>
        <e type="operator" args="2">:</e>
        <e type="operand">Num</e>
        <e type="operand">100</e>
        <e type="operator" args="2">:</e>
        <e type="operand">3</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="5">line</e>
      </input>
    </math>
  </region>
  <region id="8" left="459" top="630" width="136" height="26" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">U</e>
        <e type="operand">L</e>
        <e type="operand">H</e>
        <e type="operand">Num</e>
        <e type="function" args="3">xd</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="9" left="45" top="711" width="140" height="69" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">X</e>
        <e type="operand">data</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="2">col</e>
        <e type="operator" args="2">:</e>
        <e type="operand">Y</e>
        <e type="operand">data</e>
        <e type="operand">2</e>
        <e type="function" preserve="true" args="2">col</e>
        <e type="operator" args="2">:</e>
        <e type="operand">n</e>
        <e type="operand">data</e>
        <e type="function" preserve="true" args="1">rows</e>
        <e type="operator" args="2">:</e>
        <e type="operand">3</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="5">line</e>
      </input>
    </math>
  </region>
  <region id="10" left="333" top="711" width="176" height="40" border="true" color="#000000" bgColor="#ffffe1" fontSize="10">
    <text lang="eng">
      <p>Initialise the blankdiagonal matrix</p>
    </text>
  </region>
  <region id="11" left="333" top="756" width="71" height="32" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">M</e>
        <e type="operand">1</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="3">el</e>
        <e type="operand">1</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="12" left="423" top="756" width="71" height="32" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">M</e>
        <e type="operand">n</e>
        <e type="operand">n</e>
        <e type="function" preserve="true" args="3">el</e>
        <e type="operand">1</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="13" left="558" top="774" width="111" height="81" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">M</e>
      </input>
      <result action="numeric">
        <e type="operand">1</e>
        <e type="operand">0</e>
        <e type="operand">0</e>
        <e type="operand">0</e>
        <e type="operand">0</e>
        <e type="operand">0</e>
        <e type="operand">0</e>
        <e type="operand">0</e>
        <e type="operand">0</e>
        <e type="operand">0</e>
        <e type="operand">0</e>
        <e type="operand">0</e>
        <e type="operand">0</e>
        <e type="operand">0</e>
        <e type="operand">0</e>
        <e type="operand">1</e>
        <e type="operand">4</e>
        <e type="operand">4</e>
        <e type="function" preserve="true" args="18">mat</e>
      </result>
    </math>
  </region>
  <region id="14" left="45" top="792" width="85" height="45" color="#000000" bgColor="#ebebeb" fontSize="10">
    <math>
      <input>
        <e type="operand">N</e>
        <e type="operand">n</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">:</e>
        <e type="operand">r</e>
        <e type="operand">2</e>
        <e type="operand">N</e>
        <e type="function" preserve="true" args="2">range</e>
        <e type="operator" args="2">:</e>
        <e type="operand">2</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="4">line</e>
      </input>
    </math>
  </region>
  <region id="15" left="153" top="801" width="301" height="31" color="#000000" bgColor="#ebebeb" fontSize="14">
    <text lang="eng">
      <p bold="true">Prepare the cubic splines</p>
    </text>
  </region>
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    <math optimize="2" decimalPlaces="4">
      <description active="true" position="Top" lang="eng">
        <p>Install the constant vector 'br'</p>
      </description>
      <input>
        <e type="operand">i</e>
        <e type="operand">r</e>
        <e type="operand">br</e>
        <e type="operand">i</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">Y</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">Y</e>
        <e type="operand">i</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="operand">X</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">X</e>
        <e type="operand">i</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">/</e>
        <e type="bracket">(</e>
        <e type="operand">Y</e>
        <e type="operand">i</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">Y</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="operand">X</e>
        <e type="operand">i</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">X</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">/</e>
        <e type="bracket">(</e>
        <e type="operator" args="2">-</e>
        <e type="function" preserve="true" args="1">eval</e>
        <e type="operator" args="2">:</e>
        <e type="operand">br</e>
        <e type="operand">N</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">0</e>
        <e type="operator" args="2">:</e>
        <e type="operand">2</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="4">line</e>
        <e type="function" preserve="true" args="3">for</e>
      </input>
    </math>
  </region>
  <region id="17" left="45" top="981" width="671" height="31" color="#000000" bgColor="#80ffff" fontSize="14">
    <text lang="eng">
      <p bold="true">Fill-in the respective l_p_c splines tridiagonal matrices</p>
    </text>
  </region>
  <region id="18" left="45" top="1026" width="499" height="24" color="#000000" bgColor="#fff5eb" fontSize="10">
    <text lang="eng">
      <p bold="true">0. Construct the tridiagonal linear spline matrix [lspline] </p>
    </text>
  </region>
  <region id="19" left="45" top="1053" width="182" height="65" border="true" color="#000000" bgColor="#fff5eb" fontSize="10">
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        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
        <e type="function" preserve="true" args="3">el</e>
        <e type="operand">X</e>
        <e type="operand">i</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">X</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
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        <e type="operator" args="2">-</e>
        <e type="operand">6</e>
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      <input>
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        <e type="function" preserve="true" args="3">el</e>
        <e type="operand">X</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">X</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
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        <e type="operator" args="2">-</e>
        <e type="operand">3</e>
        <e type="operator" args="2">/</e>
        <e type="operator" args="2">:</e>
        <e type="function" preserve="true" args="3">for</e>
      </input>
    </math>
  </region>
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    <math optimize="2" decimalPlaces="4">
      <input>
        <e type="operand">i</e>
        <e type="operand">r</e>
        <e type="operand">M</e>
        <e type="operand">i</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="3">el</e>
        <e type="operand">X</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
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        <e type="operand">i</e>
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        <e type="operator" args="2">-</e>
        <e type="operand">6</e>
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  <region id="22" left="45" top="1134" width="524" height="24" color="#000000" bgColor="#ebebeb" fontSize="10">
    <text lang="eng">
      <p bold="true">1. Construct the tridiagonal parabolic spline matrix [pspline] </p>
    </text>
  </region>
  <region id="23" left="45" top="1161" width="80" height="32" color="#000000" bgColor="#ebebeb" fontSize="10">
    <math optimize="2" evaluate="false" decimalPlaces="4">
      <input>
        <e type="operand">M</e>
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        <e type="operand">2</e>
        <e type="function" preserve="true" args="3">el</e>
        <e type="operand">1</e>
        <e type="operator" args="1">-</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="24" left="162" top="1161" width="101" height="32" color="#000000" bgColor="#ebebeb" fontSize="10">
    <math optimize="2" evaluate="false" decimalPlaces="4">
      <input>
        <e type="operand">M</e>
        <e type="operand">N</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="operand">N</e>
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        <e type="operand">1</e>
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        <e type="operator" args="2">:</e>
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  </region>
  <region id="25" left="45" top="1215" width="491" height="24" color="#000000" bgColor="#fff5ff" fontSize="10">
    <text lang="eng">
      <p bold="true">2. Construct the tridiagonal cubic spline matrix [cspline] </p>
    </text>
  </region>
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        <e type="function" preserve="true" args="2">el</e>
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        <e type="function" preserve="true" args="2">el</e>
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        <e type="function" preserve="true" args="3">el</e>
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        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">X</e>
        <e type="operand">N</e>
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        <e type="operator" args="2">-</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="bracket">(</e>
        <e type="operand">X</e>
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        <e type="operator" args="2">-</e>
        <e type="function" preserve="true" args="2">el</e>
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        <e type="function" preserve="true" args="2">el</e>
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        <e type="function" preserve="true" args="2">el</e>
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        <e type="function" preserve="true" args="2">el</e>
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        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
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        <e type="operand">1</e>
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        <e type="function" preserve="true" args="3">el</e>
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      <input>
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        <e type="operand">M</e>
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  <region id="33" left="99" top="1368" width="87" height="33" color="#000000" bgColor="#ffffff" fontSize="10">
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        <e type="operand">M</e>
        <e type="operand">1</e>
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        <e type="operator" args="2">^</e>
        <e type="operand">br</e>
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        <e type="operand">8</e>
        <e type="operator" args="1">-</e>
        <e type="operand">8</e>
        <e type="operand">0</e>
        <e type="operand">4</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="6">mat</e>
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  <region id="35" left="45" top="1440" width="311" height="26" color="#000000" bgColor="#ffffff" fontSize="10">
    <math fractionType="auto">
      <input>
        <e type="operand">CWD</e>
        <e type="operand" style="string">C:\SmathFile</e>
        <e type="function" preserve="true" args="1">CurrentDirectory</e>
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  <region id="36" left="45" top="1476" width="229" height="26" color="#000000" bgColor="#ffffe1" fontSize="10">
    <math fractionType="auto">
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        <p>Spool to file the spline coefficcients</p>
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      <input>
        <e type="operand">s</e>
        <e type="operand">CWD</e>
        <e type="operand" style="string">spline</e>
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        <e type="operand">1</e>
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  <region id="37" left="45" top="1530" width="195" height="26" color="#000000" bgColor="#ffffff" fontSize="10">
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        <e type="operand">CWD</e>
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  <region id="38" left="45" top="1575" width="546" height="31" color="#000000" bgColor="#ff8040" fontSize="14">
    <text lang="eng">
      <p bold="true">Part 2. The complimentary cumulative integrate</p>
    </text>
  </region>
  <region id="39" left="45" top="1620" width="523" height="126" border="true" color="#000000" bgColor="#ffffe1" fontSize="10">
    <math optimize="2" decimalPlaces="4">
      <description active="true" position="Top" lang="eng">
        <p>Prepare the pseudo-integrand</p>
      </description>
      <input>
        <e type="operand">s</e>
        <e type="operand">X</e>
        <e type="operand">Y</e>
        <e type="function" args="3">fintegrate</e>
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        <e type="operand">1</e>
        <e type="operand">N</e>
        <e type="function" preserve="true" args="2">range</e>
        <e type="operand">h</e>
        <e type="operand">i</e>
        <e type="function" preserve="true" args="2">el</e>
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        <e type="operand">i</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">2</e>
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        <e type="operand">Y</e>
        <e type="operand">i</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">Y</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">+</e>
        <e type="bracket">(</e>
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        <e type="operand">h</e>
        <e type="operand">i</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="bracket">(</e>
        <e type="operand">3</e>
        <e type="operator" args="2">^</e>
        <e type="operand">24</e>
        <e type="operator" args="2">/</e>
        <e type="operand">s</e>
        <e type="operand">i</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">s</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">+</e>
        <e type="bracket">(</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">:</e>
        <e type="operand">2</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="4">line</e>
        <e type="function" preserve="true" args="3">for</e>
        <e type="operand">f</e>
        <e type="operand">2</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="4">line</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="40" left="45" top="1782" width="185" height="26" color="#000000" bgColor="#ffffff" fontSize="10">
    <math optimize="2" decimalPlaces="4">
      <input>
        <e type="operand">Σ</e>
        <e type="operand">s</e>
        <e type="operand">X</e>
        <e type="operand">Y</e>
        <e type="function" args="3">fintegrate</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="41" left="315" top="1782" width="43" height="24" color="#000000" bgColor="#ffff80" fontSize="10">
    <math>
      <input>
        <e type="operand">Σ</e>
        <e type="operand">Σ</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="42" left="45" top="1809" width="178" height="34" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">v</e>
        <e type="operand">X</e>
        <e type="operand">1</e>
        <e type="operand">Σ</e>
        <e type="function" preserve="true" args="1">rows</e>
        <e type="function" preserve="true" args="2">range</e>
        <e type="operand">1</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="2">range</e>
        <e type="function" preserve="true" args="3">el</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="43" left="468" top="1818" width="121" height="63" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">Σ</e>
      </input>
      <result action="numeric">
        <e type="operand">4.833333</e>
        <e type="operand">3.5</e>
        <e type="operand">2.166667</e>
        <e type="operand">3</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="5">mat</e>
      </result>
    </math>
  </region>
  <region id="44" left="45" top="1854" width="362" height="28" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">pointΣ</e>
        <e type="operand">v</e>
        <e type="operand">Σ</e>
        <e type="function" preserve="true" args="2">augment</e>
        <e type="operand" style="string">o</e>
        <e type="operand">5</e>
        <e type="operand" style="string">black</e>
        <e type="function" args="4">plot</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="45" left="45" top="1890" width="240" height="158" color="#000000" bgColor="#ffffff" fontSize="10">
    <plot type="2d" render="points" scale_x="2.00634408223202" scale_y="3.07390715926358" scale_z="176.95450261709" rotate_x="0" rotate_y="0" rotate_z="0" transpose_x="-66" transpose_y="-48" transpose_z="0">
      <description active="true" position="Top" lang="eng">
        <p>view the point-integrand</p>
      </description>
      <input>
        <e type="operand">pointΣ</e>
      </input>
    </plot>
  </region>
  <region id="46" left="297" top="1890" width="297" height="145" border="true" color="#000000" bgColor="#ffffe1" fontSize="10">
    <math optimize="2" decimalPlaces="4">
      <description active="true" position="Top" lang="eng">
        <p>Export the cumulative integral</p>
      </description>
      <input>
        <e type="operand">Σcumul</e>
        <e type="operand">n</e>
        <e type="operand">X</e>
        <e type="function" preserve="true" args="1">rows</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">:</e>
        <e type="operand">Sum</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">0</e>
        <e type="operator" args="2">:</e>
        <e type="operand">Sum</e>
        <e type="operand">n</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">0</e>
        <e type="operator" args="2">:</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operand">n</e>
        <e type="function" preserve="true" args="2">range</e>
        <e type="operand">Sum</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">Sum</e>
        <e type="operand">i</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">Σ</e>
        <e type="operand">i</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="1">eval</e>
        <e type="operator" args="2">:</e>
        <e type="function" preserve="true" args="3">for</e>
        <e type="operand">X</e>
        <e type="operand">Sum</e>
        <e type="function" preserve="true" args="2">augment</e>
        <e type="operand">5</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="7">line</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="47" left="603" top="1980" width="125" height="24" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">Σcumul</e>
        <e type="operand">Σcumul</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="48" left="315" top="2079" width="268" height="26" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">Σ</e>
        <e type="operand">Σcumul</e>
        <e type="operand" style="string">o</e>
        <e type="operand">5</e>
        <e type="operand" style="string">black</e>
        <e type="function" args="4">plot</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="49" left="45" top="2133" width="260" height="158" color="#000000" bgColor="#ffffff" fontSize="10">
    <plot type="2d" render="lines" scale_x="0.899697631356956" scale_y="4.09412093084428" scale_z="3.68347090396954" rotate_x="0" rotate_y="0" rotate_z="0" transpose_x="-81" transpose_y="-52" transpose_z="0">
      <description active="true" position="Top" lang="eng">
        <p>l_p_c spline cumulative integrate</p>
      </description>
      <input>
        <e type="operand">Σ</e>
        <e type="operand">Σcumul</e>
        <e type="operand">2</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="4">sys</e>
      </input>
    </plot>
  </region>
  <region id="50" left="468" top="2160" width="178" height="81" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">Σcumul</e>
      </input>
      <result action="numeric">
        <e type="operand">1</e>
        <e type="operand">0</e>
        <e type="operand">2</e>
        <e type="operand">4.833333</e>
        <e type="operand">3</e>
        <e type="operand">8.333333</e>
        <e type="operand">4</e>
        <e type="operand">10.5</e>
        <e type="operand">4</e>
        <e type="operand">2</e>
        <e type="function" preserve="true" args="10">mat</e>
      </result>
    </math>
  </region>
  <region id="51" left="45" top="2448" width="476" height="31" color="#000000" bgColor="#ff8040" fontSize="14">
    <text lang="eng">
      <p bold="true">Part 3. The complimentary scalar dspline</p>
    </text>
  </region>
  <region id="52" left="45" top="2493" width="549" height="305" border="true" color="#000000" bgColor="#e1ffff" fontSize="10">
    <math optimize="2" decimalPlaces="4">
      <input>
        <e type="operand">s</e>
        <e type="operand">X</e>
        <e type="operand">Y</e>
        <e type="operand">t</e>
        <e type="function" args="4">dspline</e>
        <e type="operand">t</e>
        <e type="operand">X</e>
        <e type="operand">2</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">≤</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operator" args="2">:</e>
        <e type="operand">t</e>
        <e type="operand">X</e>
        <e type="operand">X</e>
        <e type="function" preserve="true" args="1">rows</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">≥</e>
        <e type="operand">k</e>
        <e type="operand">X</e>
        <e type="function" preserve="true" args="1">rows</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">:</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operator" args="2">:</e>
        <e type="operand">t</e>
        <e type="operand">X</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">&gt;</e>
        <e type="operand">k</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="operator" args="2">:</e>
        <e type="function" preserve="true" args="2">while</e>
        <e type="operand">2</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="4">line</e>
        <e type="function" preserve="true" args="3">if</e>
        <e type="function" preserve="true" args="3">if</e>
        <e type="operand">c</e>
        <e type="operand">Y</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">Y</e>
        <e type="operand">k</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="operand">X</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">X</e>
        <e type="operand">k</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">/</e>
        <e type="operand">s</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">2</e>
        <e type="operand">s</e>
        <e type="operand">k</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">+</e>
        <e type="bracket">(</e>
        <e type="operand">X</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">X</e>
        <e type="operand">k</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="operand">6</e>
        <e type="operator" args="2">/</e>
        <e type="bracket">(</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">:</e>
        <e type="operand">s</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">s</e>
        <e type="operand">k</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="operand">X</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">X</e>
        <e type="operand">k</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">/</e>
        <e type="bracket">(</e>
        <e type="operand">t</e>
        <e type="operand">X</e>
        <e type="operand">k</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="bracket">(</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operand">2</e>
        <e type="operator" args="2">/</e>
        <e type="operator" args="2">*</e>
        <e type="operand">s</e>
        <e type="operand">k</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">t</e>
        <e type="operand">X</e>
        <e type="operand">k</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="bracket">(</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">+</e>
        <e type="operand">c</e>
        <e type="operator" args="2">+</e>
        <e type="operand">3</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="5">line</e>
        <e type="function" preserve="true" args="1">eval</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="53" left="45" top="2835" width="205" height="26" color="#000000" bgColor="#ffffff" fontSize="10">
    <math decimalPlaces="4">
      <input>
        <e type="operand">x</e>
        <e type="function" args="1">D</e>
        <e type="operand">s</e>
        <e type="operand">X</e>
        <e type="operand">Y</e>
        <e type="operand">x</e>
        <e type="function" args="4">dspline</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="54" left="324" top="2835" width="140" height="26" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">3</e>
        <e type="function" args="1">D</e>
      </input>
      <result action="numeric">
        <e type="operand">1.666667</e>
        <e type="operator" args="1">-</e>
      </result>
    </math>
  </region>
  <region id="55" left="315" top="2880" width="145" height="26" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">D2</e>
        <e type="operand">X</e>
        <e type="operand">s</e>
        <e type="function" preserve="true" args="2">augment</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="56" left="45" top="2889" width="208" height="78" border="true" color="#000000" bgColor="#e1ffff" fontSize="10">
    <math>
      <input>
        <e type="operand">x</e>
        <e type="function" args="1">plotD</e>
        <e type="operand">L</e>
        <e type="operand">x</e>
        <e type="operator" args="2">≤</e>
        <e type="bracket">(</e>
        <e type="operand">x</e>
        <e type="operand">H</e>
        <e type="operator" args="2">≤</e>
        <e type="bracket">(</e>
        <e type="operator" args="2">&amp;</e>
        <e type="bracket">(</e>
        <e type="operand">x</e>
        <e type="function" args="1">D</e>
        <e type="operand" style="string">out spline</e>
        <e type="function" preserve="true" args="3">if</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="57" left="306" top="2907" width="96" height="81" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">D2</e>
      </input>
      <result action="numeric">
        <e type="operand">1</e>
        <e type="operand">0</e>
        <e type="operand">2</e>
        <e type="operand">8</e>
        <e type="operator" args="1">-</e>
        <e type="operand">3</e>
        <e type="operand">8</e>
        <e type="operand">4</e>
        <e type="operand">0</e>
        <e type="operand">4</e>
        <e type="operand">2</e>
        <e type="function" preserve="true" args="10">mat</e>
      </result>
    </math>
  </region>
  <region id="58" left="396" top="2934" width="327" height="28" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">x</e>
        <e type="function" args="1">D2</e>
        <e type="operand">D2</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="2">col</e>
        <e type="operand">D2</e>
        <e type="operand">2</e>
        <e type="function" preserve="true" args="2">col</e>
        <e type="operand">x</e>
        <e type="function" preserve="true" args="3">linterp</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="59" left="45" top="2997" width="240" height="158" border="true" color="#000000" bgColor="#ffffff" fontSize="10">
    <plot type="2d" render="points" scale_x="0.346755847249602" scale_y="3.122172204366" scale_z="1.08263146798409" rotate_x="0" rotate_y="0" rotate_z="0" transpose_x="-78" transpose_y="-1" transpose_z="0">
      <description active="true" position="Top" lang="eng">
        <p>The scalar dspline</p>
      </description>
      <input>
        <e type="operand">x</e>
        <e type="function" args="1">plotD</e>
        <e type="operand">0</e>
        <e type="operand">2</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="4">sys</e>
      </input>
    </plot>
  </region>
  <region id="60" left="288" top="2997" width="262" height="158" border="true" color="#000000" bgColor="#ffe1e1" fontSize="10">
    <plot type="2d" render="points" scale_x="0.41754157682873" scale_y="3.33126505936653" scale_z="9.12997324351374" rotate_x="0" rotate_y="0" rotate_z="0" transpose_x="-85" transpose_y="0" transpose_z="0">
      <description active="true" position="Top" lang="eng">
        <p>2nd derivative directly from [X,s]</p>
      </description>
      <input>
        <e type="operand">x</e>
        <e type="function" args="1">D2</e>
        <e type="operand">0</e>
        <e type="operand">2</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="4">sys</e>
      </input>
    </plot>
  </region>
  <region id="61" left="288" top="3231" width="267" height="31" color="#000000" bgColor="#ffe1e1" fontSize="14">
    <text lang="eng">
      <p bold="true">Observe 2nd derivative</p>
    </text>
  </region>
  <region id="62" left="45" top="3285" width="453" height="31" color="#000000" bgColor="#ff8040" fontSize="14">
    <text lang="eng">
      <p bold="true">Part 4. The [lpc] spline interpolation</p>
    </text>
  </region>
  <region id="63" left="45" top="3321" width="583" height="369" border="true" color="#000000" bgColor="#ffffc8" fontSize="10">
    <math decimalPlaces="4">
      <description active="true" position="Top" lang="eng">
        <p>The while loop form of the spline interpolation function</p>
      </description>
      <input>
        <e type="operand">s</e>
        <e type="operand">X</e>
        <e type="operand">Y</e>
        <e type="operand">t</e>
        <e type="function" args="4">interpspline</e>
        <e type="operand" style="string">Find the knots that bracket 't' </e>
        <e type="operand">i0</e>
        <e type="operand">1</e>
        <e type="operator" args="2">:</e>
        <e type="operand">j</e>
        <e type="operand">X</e>
        <e type="function" preserve="true" args="1">rows</e>
        <e type="operator" args="2">:</e>
        <e type="operand">j</e>
        <e type="operand">i0</e>
        <e type="operator" args="2">-</e>
        <e type="operand">1</e>
        <e type="operator" args="2">&gt;</e>
        <e type="operand">i</e>
        <e type="operand">i0</e>
        <e type="operand">j</e>
        <e type="operator" args="2">+</e>
        <e type="operand">2</e>
        <e type="operator" args="2">/</e>
        <e type="function" preserve="true" args="1">Floor</e>
        <e type="operator" args="2">:</e>
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        <e type="operand">x</e>
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      <p>Sources and credits:1. Mathsoft for the tridiagonal systems.2. Robert Adair for the algos:...InterpSpline(s,X,Y,t) ...dspline(s,X,Y,t)...fintegrate(s,vx,vy)3. Smath adapted: Jean Giraud</p>
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        <e type="operand">4</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="6">line</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="73" left="666" top="4401" width="403" height="81" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">data</e>
        <e type="operand" style="string">o</e>
        <e type="operand">5</e>
        <e type="operand" style="string">black</e>
        <e type="function" args="4">plot</e>
      </input>
      <result action="numeric">
        <e type="operand">1</e>
        <e type="operand">4</e>
        <e type="operand" style="string">o</e>
        <e type="operand">5</e>
        <e type="operand" style="string">black</e>
        <e type="operand">2</e>
        <e type="operand">5</e>
        <e type="operand" style="string">o</e>
        <e type="operand">5</e>
        <e type="operand" style="string">black</e>
        <e type="operand">3</e>
        <e type="operand">2</e>
        <e type="operand" style="string">o</e>
        <e type="operand">5</e>
        <e type="operand" style="string">black</e>
        <e type="operand">4</e>
        <e type="operand">3</e>
        <e type="operand" style="string">o</e>
        <e type="operand">5</e>
        <e type="operand" style="string">black</e>
        <e type="operand">4</e>
        <e type="operand">5</e>
        <e type="function" preserve="true" args="22">mat</e>
      </result>
    </math>
  </region>
  <region id="74" top="5004" color="#000000" bgColor="#ffff80">
    <area single="true" collapsed="true" />
  </region>
</regions>