Difference (DSP Blockset)

Compute the element-to-element difference along a vector.

Library

Vector Functions, in Math Functions

Description

The Difference block computes the difference between successive vector elements. That is, for an input vector u of length N,

y = [u(2)-u(1) u(3)-u(2) ... u(N)-u(N-1)]

y = diff(u)          % equivalent MATLAB code

The output is a vector of length N-1. A matrix input, u, is treated as a vector, u(:).

Note
If you expect to generate code for the Difference block using the Real-Time Workshop, you should ensure that inputs are contiguous in memory. See the Contiguous Copy block for more information.

Dialog Box