Is it possible for the XY Graph block in Simulink 7.5 (R2010a) to have the capability to draw until a particular time, clear the figure, and start redrawing again?

Every time I complete plotting in a particular range, I should be able to clear the figure and start re-plotting. I need to be able to conditionally refresh the XY Graph block in Simulink.

Answer 1

[MathWorks Support Team]

This ability to conditionally refresh the display of the XY Graph block is not available in Simulink 7.5 (R2010a).

As a workaround, you can write an S-function that achieves this functionality. The S-function for the existing XY Graph block is available for editing at the following location:

 $MATLABROOT\toolbox\simulink\blocks\sfunxy.m

where $MATLABROOT is the value returned by executing the following command at the MATLAB command prompt:

>> matlabroot

As an example, see the attached files. This S-function clears the XY Graph data whenever there is a rising edge at the third input port to this block. The period of the pulse generator is set such that the graph will be cleared after each half-circle is drawn.