# The mysteriously disappearing graph

Plot the graph of y=sin(5*pi*t) with -4<=t<4 at a sampling interval of 0.05.

Now change the sampling interval to 0.2 and the graph disappears! (i.e. the values are approximately zero everywhere). Where has it gone?

#digitalfunctions #dsp #nyquistfrequency #frequencyanalysis

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Google Play and the Google Play logo are trademarks of Google LLC.

Versions will shortly be available for iOS and Windows.

plotXpose app is a companion to the book Mathematics for Electrical Engineering and Computing by Mary Attenborough, published by Newnes, 2003.