## Contents

## SS2FRF

Calculates an LTI Frequency Response Function

## Syntax

`H = ss2frf(A,B,C,D,w)`

## Description

This function calculates the frequency-response function of a LTI state-space system that has the following model structure:

or:

## Inputs

`A,B,C,D` aer the system matrices describing the state-space system. If there is no D-matrix, pass an empty matrix.

`w` is the vector of complex frequencues at which the frequency response function is to be calculated. Typically, this is for continuous-time systems

and

for discrete-time systems.

## Outputs

`H` is the measured frequency response function (FRF). This is a matrix that follows the MATLAB 5 FRF Convention: It is a 3D-array of size *l* x *m* x *N*, in which *H(:,:,j)* is the FRF at the *j* th complex frequency.