The Split command splits an expression into a unitless part and a unit.

By default, the command returns both the unitless part and the unit as an expression sequence: first the unitless part, then the unit.

You can use the output option to make Split return only one of the two. If you specify $\mathrm{output}=\mathrm{unit}$, only the unit is returned. If you specify $\mathrm{output}=\mathrm{coefficient}$, only the unitless part is returned. If you specify $\mathrm{output}=l$, where $l$ is a list of the names $\mathrm{unit}$ and $\mathrm{coefficient}$, then Split returns the corresponding values as an expression sequence in the order specified. The default value of the $\mathrm{output}$ option is $\left[\mathrm{coefficient}\,\mathrm{unit}\right]$.

If expr is itself unitless, the unit is 1. If expr is just a unit (that is, a call to the Unit function), the unitless part is 1.

$\mathrm{with}\left(\mathrm{Units}\right)\:$

Automatically loading the Units[Simple] subpackage

$\mathrm{expr}≔5\mathrm{Unit}\left(m\right)$

$\mathrm{expr}≔5⟦m⟧$

$\mathrm{Split}\left(\mathrm{expr}\right)$

$5,⟦m⟧$

$\mathrm{Split}\left(\mathrm{Unit}\left(\mathrm{barrel}\left[\mathrm{beer}\right]\right)\right)$

$1,⟦{\mathrm{bbl}}_{\mathrm{beer}}⟧$

$\mathrm{Split}\left(17\right)$

$17,1$

$\mathrm{distance}≔17\mathrm{Unit}\left(m\right)$

$\mathrm{distance}≔17⟦m⟧$

$\mathrm{speed}≔5\mathrm{Unit}\left(\frac{\mathrm{km}}{h}\right)$

$\mathrm{speed}≔5⟦\frac{\mathrm{km}}{h}⟧$

$\mathrm{duration}≔\frac{\mathrm{distance}}{\mathrm{speed}}$

$\mathrm{duration}≔\frac{17}{5000}⟦h⟧$

$\mathrm{Split}\left(\mathrm{duration}\right)$

$\frac{17}{5000},⟦h⟧$

$\mathrm{Split}\left(\mathrm{duration}\,\mathrm{output}=\mathrm{coefficient}\right)$

$\frac{17}{5000}$

$\mathrm{Split}\left(\mathrm{duration}\,\mathrm{output}=\left[\mathrm{unit}\,\mathrm{coefficient}\right]\right)$

$⟦h⟧,\frac{17}{5000}$

The Units[Split] command was introduced in Maple 2021.

For more information on Maple 2021 changes, see Updates in Maple 2021.