# PS Subtract

Compute simple subtraction of two input physical signals

## Library

Physical Signals/Functions

## Description

The PS Subtract block subtracts one physical signal input from another and outputs the difference:

`$y={u}_{1}-{u}_{2}$`

where

 `u1` Physical signal at the first input port (marked with the plus sign) `u2` Physical signal at the second input port (marked with the minus sign) `y` Physical signal at the output port

## Dialog Box and Parameters

The PS Subtract block has no parameters.

## Ports

The block has two physical signal input ports and one physical signal output port.