Unit conversion helper #1704
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Unit conversion helper #1704
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This PR adds the
unit_conversion()helper function; this returns a conversion factor for transforming a value from one form of measurement units to a target form. For example if you have a length value that is expressed in miles you could transform that value to one in kilometers through multiplication of the value by the conversion factor (in this case1.60934).This is useful for expressing values in different units and the conversion can be easily performed via the
scale_byargument available in several formatting functions.When calling
unit_conversion(), one must supply two string-based keywords to specify the value's current units and the desired units. All of these keywords are provided in the table shown by callinginfo_unit_conversions()(which is added here).