create a three-dimensional surface plot

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Hidd_1
Hidd_1 2020-12-18
回答： Star Strider 2020-12-18
Hello everybody!
I want to create a three-dimensional surface plot using the function surf, but unfortanatley there is a bug in my code which i coudn't solve or understand.
I would be greatful for any help!
Here is the code:
creates a three-dimensional surface plot:
[x,y] = meshgrid(1:0.5:10,1:20);
z = ((x^2)/(1+(x^2))) + y^2;
xlabel(x)
ylabel(y)
zlabel(z)
surf(x,y,z)
the function is the following
Thnak you very much in advance!
Best regards,

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采纳的回答

Star Strider
Star Strider 2020-12-18
Use element-wise operations for exponentiation (.^) and division (./):
z = ((x.^2)./(1+(x.^2))) + y.^2;
Then, it works.
See Array vs. Matrix Operations for details.

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