Units[Converter]

 add a dimension to or modify a dimension in the Unit Converter

Parameters

 dim - expression of type dimension(derived) opts - equation(s) of the form option=value where option is one of 'display', 'default', or 'make'; specify options for the dimension

Description

 • The AddDimension(dim, opts) function adds a new dimension to or modifies options of an existing dimension in the Unit Converter.
 • You describe the options of the dimension by using the optional arguments. The opts argument can contain one or more of the following equations.
 'display'=string
 This option gives the text that appears in the drop-down box in the Unit Converter dialog box.  If this option is not given, the entry is dim.
 'default'=truefalse
 This option specifies whether the dimension appears as the default dimension in the Dimension: drop-down box in the Unit Converter dialog box. The default value is false.
 'make'=truefalse
 This option specifies whether the conversion tables are rebuilt after the dimension has been added to the Unit Converter.  By default, this option is set to true. If $10$ or more dimensions or units are added to or removed from the Unit Converter in one execution group, it is recommended that you execute the Units[Converter][MakeConverter]() calling sequence afterward.

Examples

 > $\mathrm{with}\left(\mathrm{Units}\left[\mathrm{Converter}\right]\right):$
 > $\mathrm{AddDimension}\left('\mathrm{action}','\mathrm{display}'="action"\right)$

Change the spelling in the text of 'speed'

 > $\mathrm{AddDimension}\left(\frac{'\mathrm{length}'}{'\mathrm{time}'},'\mathrm{display}'="velocity"\right)$

Set the existing dimension of energy as the default dimension

 > $\mathrm{AddDimension}\left('\mathrm{energy}','\mathrm{default}'\right)$