There are two pzmap().
For one of them, you pass in numeric parameters representing the state space of poles and zeros, and it constructs a system for you and draws the plot. This version cannot be passed information about where to draw, so it always ends up drawing in a traditional figure.
The second of the two pzmap(), you pass in a system that has already been constructed, such as a tf() . If you use this version, then you can pass a uiaxes as the first parameter and it will use that to draw into.
