How do I plot a fourier transform?

syms t w
x1 = sin(2*pi*20*t)*cos(2*pi*2000*t);
x2 = sin(2*pi*40*t)*cos(2*pi*4000*t);
x = x1+x2;

X= fourier(x,t,w)
mag = abs(X)

I can't seem to figure out how to plot this.

[ha9981]

The output is a series of dirac delta. HOW THE HECK TO PLOT IN MATLAB?

Answer 1

[Walter Roberson]

mag_func = matlabFunction(mag, w);

wrange = linspace(-100, 100, 1000);  %adjust as desired
plot(wrange, mag_func(wrange))