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plot a cosine function

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sa gharibi

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I want to plot cos(2*pi *t) over t=[0 1] with 30 samples,please help me.
 
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You can do this with Matlab or GNU Octave (a free alternative), using the following code:

Code: 
t = linspace(0,1,30);
plot(t, cos(2*pi*t));

The first line creates 30 linearly-spaced time intervals over [0,1]. The second line computes the cosine and plots it against t.
 

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