This can be accomplished using a MATLAB file S-function which calls a plot command during the mdlUpdate function or mdlOutput function.
Download the attached example files:
1. sim_gui.mdl
2. sim_gui_plot.m
and place it on the MATLAB search path.
This model shows two points moving in a 2-D space, controlled by Simulink inputs.
There are a couple of things to keep in mind while doing this:
1) It is best to avoid performing a PLOT command on each iteration, since this will take significant resources and may cause flickering.
2) The 'DoubleBuffer' property of the figure should be set to 'On' to prevent flickering.
