# PS Abs

Output absolute value of input physical signal

• Library:
• Simscape / Foundation Library / Physical Signals / Nonlinear Operators

## Description

The PS Abs block returns the absolute value of the input physical signal:

`$O=|I|$`

where

 I Physical signal at the input port O Physical signal at the output port

Untyped physical ports facilitate unit propagation. The output signal has the same physical unit as the input signal.

## Ports

### Input

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Input physical signal.

The port name is not visible in the block icon, but you can see this name in the underlying source file by clicking the Source code link in the Description tab of the block dialog box.

### Output

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Output physical signal.

The port name is not visible in the block icon, but you can see this name in the underlying source file by clicking the Source code link in the Description tab of the block dialog box.

## Version History

Introduced in R2008a

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