Use of functions ctrb and poly

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Ken
Ken il 18 Feb 2025
Commentato: Ken il 18 Feb 2025
I have 2 matrices A, B. I use ctrb(A,B) to get matrix P and then try to use poly(P) to get the polynomial of P but get error msg saying it requires a vector or square matrix. Any suggestions?

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Sam Chak
Sam Chak il 18 Feb 2025
Ran in:
No error message generated. You should provide yours to find out the actual issue.
A = [ 0 1;
-1 -2];
B = [ 0;
1];
P = ctrb(A, B)
P = 2×2
0 1 1 -2
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<mw-icon class=""></mw-icon>
cp = poly(P)
cp = 1×3
1.0000 2.0000 -1.0000
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
  1 Commento
Ken
Ken il 18 Feb 2025
Thanks - my B matrix was 2X2, SHOULD BE 2X1 like yours

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