# simscape.computationalUnit

Determine computational unit for commensurate units

## Syntax

``cu = simscape.computationalUnit(unitlist)``

## Description

example

````cu = simscape.computationalUnit(unitlist)` returns the computational unit for a set of units specified by `unitlist`. Computational unit is the common unit used for certain math operations on operands with commensurate units. For more information, see Computational Units.All arguments in the list must have commensurate units. The function returns the computational unit `cu` as a scalar `simscape.Unit` object. ```

## Examples

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Create `simscape.Value` objects with commensurate units:

```v1 = simscape.Value([100, 200, 300], "mm"); v2 = simscape.Value(10, "cm"); v3 = simscape.Value(1, "ft");```

Determine the computational unit for the first two objects:

` cu = simscape.computationalUnit(v1,v2)`
```cu = cm```

Computational unit is the unit with the largest conversion factor to the fundamental unit. The fundamental unit for length is `m`. The conversion factor of `cm` into `m` is larger than that of `mm` into `m`, therefore, the function returns `cm`.

Now determine the computational unit for all three objects:

` cu = simscape.computationalUnit(v1,v2,v3)`
```cu = ft```

The conversion factor of `ft` into `m` is larger than that of `cm` or `mm`, therefore, the function now returns `ft`.

You can also specify the input arguments as strings, character vectors, or scalar `simscape.Unit` objects. For example:

` cu = simscape.computationalUnit(v1,v2,"in")`
```cu = in```

## Input Arguments

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List of units of potential operands, specified as character vectors, strings, scalar `simscape.Unit` objects, or `simscape.Value` objects. For `simscape.Value` objects, the function uses the unit of the object. All units must be commensurate. The list cannot contain affine units, such as `degC` or `degF`.

## Version History

Introduced in R2021b