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Page Revision: 2013/01/03 11:06

SMath Studio can handle units; there's a large list of built-in units available for the most common applications that could be easily extended by the user.

Units are represented with an

italic blue-colored font

.

Insert a unit

To insert a unit, press the apostrophe (') and then digit the unit name; the placeholder shape will change and the dynamic assistance box can help you showing the built-in units (double click or press the TAB key to insert the selected unit in the formula).

Alternatively you can add a built-in unit by the units window (CTRL+W or menu "Insert" > "Unit..."), where you can easily find the unit by name or by family.

Evaluating an expression that contain units, the output will be delivered with the default units (SI base units); to change the output unit, write your favorite unit in the right placeholder.

NOTE: the multiplication sign for units is hidden by default, so units like kN*m are shown kN m; to avoid errors the right way to type the unit is 'kN*'m, not 'kNm.

Custom units

You may define/override an unit inside the sheet (simplest way) or handling the Units.xml file.

Units language

if you have not yet implemented localized units in your country leave a comment here: localization differences

From the menu "Tools" > "Options..." you can change the units language.

Unit description

The built-in unit description can be retrieved as a string using the description() function.

Known issues

to inform the developers about issues you found out use the forum: bugs&problems

Not all built-in functions work with units; to work with these functions divide the argument for the expected unit and multiply the result by the same unit.

The 0 value have no units. If you want an unit as output even when the result can be null, set the unit in the right placeholder.

Be careful handling relative and absolute temperatures units; there's an open discussion here.

History

• SMath 0.87.3719 (Beta): first relase
• SMath 0.88 (Stable): first stable relase
• SMath 0.90 (Stable): translatable units implemented

See also

• Built-in Units
• Keyboard shortcuts
• description()

References

• Introduction to SMath Studio 0.88 (PDF)
• Video examples of calculations with units for hydraulics (G.Urroz) - See Part 2 SMath Studio
• Crib Sheet for SMath Studio 0.95 (PDF)
• Crib Sheet for SMath Studio 0.90 (PDF)
• Crib Sheet for SMath Studio 0.89 (PDF)
• Crib Sheet for SMath Studio 0.88 (PDF)
• Custom units examples (sm)
• Unit.xml editing rules - SMath forum