I used the MATLAB function [r,p,k] = residue(num,den). For example assume:
num = [1 4];
den = [1 6 11 6];
[r,p,k] = residue(num,den)
This gives:
r = [0.5;-2.0;1.5]
p = [-3.0;-2.0;-1.0]
0.5 is the coefficient for the partial fraction expansion, which is associated with the pole -3
-2 is associated with -2, and 1.5 is associated with -1.
The question is, is there a way to make changes to matrix p apply to r? For example if I swap -3 and -2 in p, this would swap 0.5 and -2 in r automatically. (The only change I want to apply is swapping elements, no operations on elements or adding extra elements.)
Thank you in advance.
Regards, M Ayoub.
