Symbolic Root Locus GUI

Root locus plot GUI using symbolic expressions.

Yet another interactive tool to create root locus plot GUI. This one is simple, see also Erik Cheever's GUI for Root Locus.

The user provides a continuous or discrete transfer function WITH
a gain variable vector k.

The Demo-button toggles between two illustrative examples (s- and z-plane).

Also contains a button for exporting the root-locus plot into a new figure.