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Rotate Meshgrid 45 Degrees

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Ermin Sehovic
Ermin Sehovic 2016-5-2
评论： qilin guo 2021-6-10
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]);

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回答（2 个）

Star Strider
Star Strider 2016-5-2
If I understand correctly what you want to do, just set:
az = 45;
  2 个评论
Ermin Sehovic
Ermin Sehovic 2016-5-2
Not exactly. I want to rotate it from a mathematical point of view. Do I need to multiply with a rotation matrix?
Star Strider
Star Strider 2016-5-2
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.

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Jan Orwat
Jan Orwat 2016-5-3
编辑：Jan Orwat 2016-5-3
theta = 45;
x2 = x*cosd(theta) - y*sind(theta);
y2 = x*sind(theta) + y*cosd(theta);
  2 个评论
Ermin Sehovic
Ermin Sehovic 2016-5-3
I have tried it, but it doesn't rotate the mesh 45 degrees as you can see on the picture.
qilin guo
qilin guo 2021-6-10
Very good answer!!! It helps me a lot! Thank you very much!

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