So.. I want to make spectrogram out of 4 signals that i need to add in array.
When I add them in array, it looks like this s=[x1 x2 x3 x4]; or with values: [1 1 0 1] But I'm not sure if it's proper adding..
Example of signal si this:
f1=1000; t1=0.2; x1=cos(2*pi*f1*t1);
so x1 is 1.
Is there a way of making spectrogram out of s?