rlocus

[John W. Eaton]

On 25-Jan-2002, Torsten Howard <address@hidden> wrote:

| I went and tried to do a simple rlocus this evening, but it wasn't simple.
| 
| I'll put a transcipt at the end of the page, how do I make this work?
| 
| octave:1> num = [1];
| octave:2> den = [1 6 11 6];
| octave:3> rlocus(num,den)
| error: Asys must be a system data structure (see ss2sys, tf2sys, zp2sys)

If you expect your num and den to describe a transfer function of the
form

               1
    --------------------------
    1*s^3 + 6*s^2 + 11*s^1 + 6

try

  rlocus (tf2sys (num, den))


jwe



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