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Units

 GetSystem
 list units in a system of units

 Calling Sequence GetSystem(system)

Parameters

 system - symbol; system name

Description

 • The function GetSystem(system) returns all units in a system of units.
 • For an existing system system, the call AddSystem(system, GetSystem(system)) recreates an equivalent system. The calling sequence AddSystem(system, check, GetSystem(system), new_unit) redefines the system by including new_unit and ensuring that new_unit does not have the same dimension as any of the existing units in system.

Examples

 > $\mathrm{with}\left(\mathrm{Units}\right):$
 > $\mathrm{GetSystem}\left('\mathrm{CGS}'\right)$
 ${{\mathrm{centimeter}}}_{{\mathrm{SI}}}^{{3}}{,}{{\mathrm{barye}}}_{{\mathrm{standard}}}{,}{{\mathrm{dyne}}}_{{\mathrm{standard}}}{,}{{\mathrm{second}}}_{{\mathrm{SI}}}{,}{{\mathrm{radian}}}_{{\mathrm{SI}}}{,}{{\mathrm{kyne}}}_{{\mathrm{standard}}}{,}{{\mathrm{centimeter}}}_{{\mathrm{SI}}}{,}\frac{{{\mathrm{erg}}}_{{\mathrm{standard}}}}{{{\mathrm{second}}}_{{\mathrm{SI}}}}{,}{{\mathrm{gram}}}_{{\mathrm{SI}}}{,}{{\mathrm{dollar}}}_{{\mathrm{US}}}{,}{{\mathrm{dyne}}}_{{\mathrm{standard}}}{}{{\mathrm{centimeter}}}_{{\mathrm{SI}}}{}\left({\mathrm{radius}}\right){,}{{\mathrm{gal}}}_{{\mathrm{standard}}}{,}{{\mathrm{kelvin}}}_{{\mathrm{SI}}}{,}{{\mathrm{centimeter}}}_{{\mathrm{SI}}}^{{2}}{,}{{\mathrm{erg}}}_{{\mathrm{standard}}}{,}{{\mathrm{steradian}}}_{{\mathrm{SI}}}$ (1)
 > $\mathrm{AddSystem}\left('\mathrm{FHF}','\mathrm{check}','\mathrm{furlong}','{\mathrm{hundredweight}}_{\mathrm{long}}','\mathrm{fortnight}'\right)$
 > $\mathrm{GetSystem}\left('\mathrm{FHF}'\right)$
 ${{\mathrm{fortnight}}}_{{\mathrm{standard}}}{,}{{\mathrm{furlong}}}_{{\mathrm{standard}}}{,}{{\mathrm{hundredweight}}}_{{\mathrm{long}}}$ (2)

Add the ampere to the MKS system of units and rename it the MKSA system.

If infolevel is set to a greater integer (possible settings are 1 through 5), more detailed information about the computation method is displayed.

 > $\mathrm{AddSystem}\left('\mathrm{MKSA}',\mathrm{GetSystem}\left('\mathrm{MKS}'\right),'\mathrm{ampere}'\right)$
 > ${\mathrm{infolevel}}_{\mathrm{Units}}≔1:$
 > $\mathrm{convert}\left(96485.309,'\mathrm{system}','\mathrm{electron}','\mathrm{MKS}'\right)$
 > $\mathrm{convert}\left(96485.309,'\mathrm{system}','\mathrm{electron}','\mathrm{MKSA}'\right)$
 convert/system: converting to the units A*s
 ${1.545864910}{}{{10}}^{{-14}}$ (3)
 >