create a three-dimensional surface plot

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,

Answer 1

[Star Strider]

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.