how to Plot ampitude spectrum using stem function ,

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yie don 2018-9-8

编辑： yie don 2018-9-8

m(t)= 10 cos(2pi400 t)+5 cos(2pi1000t)+2cos(2pi3000t) Plot the amplitude spectrum M(f) for f>= 0

figure t = linspace(0,1,50)'; Y = 10*cos(2*pi*400*t)+5*cos(2*pi*1000*t)+2*cos(2*pi*3000*t); stem(Y)

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R2017b

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