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

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William Baker
William Baker on 27 Apr 2020
Commented: Sriram Tadavarty on 27 Apr 2020
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?

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Answers (1)

Sriram Tadavarty
Sriram Tadavarty on 27 Apr 2020
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

  2 Comments

William Baker
William Baker on 27 Apr 2020
Wow, I could have sworn I tried this and it gave an error. Thanks so much, this fixed the issue.
Sriram Tadavarty
Sriram Tadavarty on 27 Apr 2020
Glad that it helped.

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