Rotate Meshgrid 45 Degrees

I want to rotate my meshgrid 45 degrees. How do I do that? I have the following script:

% meshgrid
[x,y] = meshgrid(-50:5:50);

O = zeros(size(x,1)); % z-values to 0

% Plot
figure; mesh(x,y,O);
az = 0;   el = 90; view(az, el);
daspect([1 1 1]);

Answer 1

[Star Strider]

If I understand correctly what you want to do, just set:

az = 45;

[Ermin Sehovic]

Not exactly. I want to rotate it from a mathematical point of view. Do I need to multiply with a rotation matrix?

[Star Strider]

See if the rotate function will do what you want, since it’s likely the easiest.

Otherwise, there are three functions that could do what you want: makehgtform, hggroup, and hgtransform. They create the rotation and translation matrix for you. They’re all related.

Answer 2

[Jan Orwat]

theta = 45;
x2 = x*cosd(theta) - y*sind(theta);
y2 = x*sind(theta) + y*cosd(theta);

[Ermin Sehovic]

I have tried it, but it doesn't rotate the mesh 45 degrees as you can see on the picture.

[qilin guo]

Very good answer!!! It helps me a lot! Thank you very much!