Hi all

In this snippet there are several functions to work with units:

- Extracting Unit of Measurement
- Calculate Order of Magnitude
- Rounding
- Truncate
- Floor
- Ceiling


best regards,

w3b5urf3r


known limitations: because 0 in SMath have no units, so UoM() return 1 every time the argument is set to 0*anyPossibleUnit

snippet updated: see reply #4

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units_examples.sm (44 KiB) downloaded 118 time(s).

Thank you very much for these useful functions!!
Could be possible a function to remove units from an equation in order to apply Solve ?
please look at
http://en.smath.info/forum/yaf_postst652_solving-equation.aspx

Wrote

Thank you very much for these useful functions!!
Could be possible a function to remove units from an equation in order to apply Solve ?
please look at
http://en.smath.info/forum/yaf_postst652_solving-equation.aspx

Hi,

happy to be useful

Actually I think the simplest way it's to insert units inside the "expression" argument of solve() (see the attachment)


regards,

w3b5urf3r

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Wrote

Thank you very much for these useful functions!!
Could be possible a function to remove units from an equation in order to apply Solve ?
please look at
http://en.smath.info/forum/yaf_postst652_solving-equation.aspx

snippet updated!

now there are [MATH]uSolve.2(#)[/MATH] and [MATH]uSolve.4(#)[/MATH] to reproduce [MATH]solve(2)[/MATH] and [MATH]solve(4)[/MATH] with units

see the attachment for the usage


regards,

w3b5urf3r

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units_examples.sm (61 KiB) downloaded 87 time(s).

Thank you sir for sharing your scripts, I didn't respond to your last post because I wanted to find the time to understand it well.
Is this usolve function able to deal with equations involving multiple units as in the example I cited above ?

Hi kilele

This snippet is a "little workaround" so have some limitations:

- [MATH]uSolve.2(#)[/MATH] and [MATH]uSolve.4(#)[/MATH] first argument must be a single-argument function

- [MATH]uSolve.2(#)[/MATH] need the third argument to know the unit of measurement of function argument


however, taking care of these limitations, inside the function you can use multiple units and the input and output units may be different (see the attachment, introduced in the new unit_examples.sm re-attached in the post above)


regards,

w3b5urf3r

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wow I am very much obliged to you ^^ this is really useful
so the second parameter of usolve2 is also the desired output unit ? in my case the following samples always output meters:
usolve2(f(x),5 m, m)=9.96 m
usolve2(f(x),5 m, mm)=9.96 m
usolve2(f(x),5 m, cm)=9.96 m

Hi,

Wrote

so the second parameter of usolve2 is also the desired output unit ? in my case the following samples always output meters:
usolve2(f(x),5 m, m)=9.96 m
usolve2(f(x),5 m, mm)=9.96 m
usolve2(f(x),5 m, cm)=9.96 m

The third parameter provide only the kind of unit (mass,length,force,pressure,etc..), the desired output unit must be set in the right side, after the evaluation (see the attachment)


regards,

w3b5urf3r

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