Plot f(x,y) = sin(2piX)sin(2piY)

So I'm attempting to plot the function f(x,y) = sin(2*pi*X)*sin(2*pi*Y) on the interval [-2,2]x[-2,2], but I'm getting an odd looking graph. So far my code looks like this:

x = -2:.1:2

y = -2:.1:2

[X,Y] = meshgrid(x,y)

Z = sin(2*pi*X)*sin(2*pi*Y)

surf(X,Y,Z)

For some reason, it's only returning a Z value of 20. Any ideas?

Answer 1

[Sriram Tadavarty]

Hi William,

Try this:

x = -2:.1:2
y = -2:.1:2
[X,Y] = meshgrid(x,y)
Z = sin(2*pi*X).*sin(2*pi*Y) % Peform element wise multiplication
surf(X,Y,Z)

Hope this helps.

Regards,

Sriram

[William Baker]

Wow, I could have sworn I tried this and it gave an error. Thanks so much, this fixed the issue.

[Sriram Tadavarty]

Glad that it helped.