Can I associate one vector with another one?

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.

Answer 1

[Adam]

There is no automatic way of doing this, you would have to apply to same swap indices yourself.

If you merge them into a single matrix though as

[r, p']

then you only need to do a single swap operation on a full row. If you wish you can them separate them back out into individual variables afterwards.