Problem Plotting Fourier Transforms of Sine waves

Hello!

So let me start off by saying that I barely use MatLab. However, my professor assigned us a homework in which we have to find the fourier transform of a multiplication of sine waves and plot it. This is what I am trying..

>> syms x y
>> f=sin(2*x)*sin(5*x)

f =

sin(2*x)*sin(5*x)

>> g=fourier(f)

g =

2*transform::fourier(cos(x)*sin(x)^6, x, -w) – 20*transform::fourier(cos(x)^3*sin(x)^4, x, -w) + 10*transform::fourier(cos(x)^5*sin(x)^2, x, -w)

>> ezplot(fourier(g))
??? Error using ==> char
Cell elements must be character arrays.

Error in ==> ezplot at 160
fmsg = char(f);

Error in ==> sym.ezplot at 45
h = ezplot(char(f));

Why am I getting this error? How can I plot the Fourier transforms of these sine waves?

Any help would be appreciated!!Hello!

>> syms x y
>> f=sin(2*x)*sin(5*x)

f =

sin(2*x)*sin(5*x)

>> g=fourier(f)

g =

2*transform::fourier(cos(x)*sin(x)^6, x, -w) – 20*transform::fourier(cos(x)^3*sin(x)^4, x, -w) + 10*transform::fourier(cos(x)^5*sin(x)^2, x, -w)

>> ezplot(fourier(g))
??? Error using ==> char
Cell elements must be character arrays.

Error in ==> ezplot at 160
fmsg = char(f);

Error in ==> sym.ezplot at 45
h = ezplot(char(f));

Why am I getting this error? How can I plot the Fourier transforms of these sine waves?

Any help would be appreciated!! Hello!

>> syms x y
>> f=sin(2*x)*sin(5*x)

f =

sin(2*x)*sin(5*x)

>> g=fourier(f)

g =

2*transform::fourier(cos(x)*sin(x)^6, x, -w) – 20*transform::fourier(cos(x)^3*sin(x)^4, x, -w) + 10*transform::fourier(cos(x)^5*sin(x)^2, x, -w)

>> ezplot(fourier(g))
??? Error using ==> char
Cell elements must be character arrays.

Error in ==> ezplot at 160
fmsg = char(f);

Error in ==> sym.ezplot at 45
h = ezplot(char(f));

Why am I getting this error? How can I plot the Fourier transforms of these sine waves?

Any help would be appreciated!! fourier, transform, sine, wave, plotting, ezplot MATLAB Answers — New Questions

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