*Reported by anonymous on 2013-05-24 14:32 UTC
The current implementation of evalfr is different from the matlab function evalfr. Could you please "fix" it.

Example: Evaluate the transfer function G=tf(1,[2,3,4]) at s=1+2j

In Matlab one would type evalfr(G,s) and get the expectet result (0.0051-0.0711j).
Using this module typing evalfr(G,s) will actually compute evalfr(G,s*j) which is (0.09756098+0.12195122j), that is, it evaluated G at the point -2+j instead.

I agree that this is what one would expect (after reading the documentation of evalfr) but I would rather have a behavior that conforms with matlab (after all the module control.matlab was designed to emulate matlab's routines)

Thanks,

Juan C. Cockburn
juan.cockburn@rit.edu