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## Re: Octave Control Toolbox: How to find the step response of a given sta

**From**: |
Zdeněk Hurák |

**Subject**: |
Re: Octave Control Toolbox: How to find the step response of a given state signal? |

**Date**: |
Thu, 09 Apr 2009 20:25:08 +0200 |

**User-agent**: |
KNode/0.10.9 |

Roque Iozzo wrote:
>* How to find the step response of a given state signal?*
>* *
>* The 'step' function produces a plot or the step response data for a system*
>* (i.e. y_1), but how can I plot the response of a state signal (i.e. x_1 or*
>* x_2)?*
Just place C equal to identity matrix, then y = x. You will have to adjust D
accordingly:
A=[-1 -0.5;1 0];
B=[0.5;0];
C=[1 0];
D=0;
S=ss(A,B,C,D);
step(S)
Sx=ss(A,B,eye(2),[0;0]);
step(Sx)
--
Zdenek Hurak, Czech Technical University in Prague