This M-file plots the common spur charts used for determining interference frequencies during a non-linear operation (such as mixing) which could cause inter-modulation distortion. The inter-modulation product order can be specified along with the type of mixing employed in the receive path of the communication receiver. Spur Chats for sum mixing, difference mixing with low-side local oscillator, and difference mixing with high-side local oscillator can be plotted. Furthermore, the order of inter-modulation distortion can be specified as well.