File:RLocus 3poles 1zero.JPG

This image was a screenshot from GNU Octave, but I "touched it up" (poorly) to make things more visible.

This graph is the root-locus of the following open-loop transfer function:

${\displaystyle T(s)=K\frac{s+2}{(s+3)(s^2+2s+2)}}$

Template:Free screenshot