How do I rotate contour plot?
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I want this contour image to have the wake moving from left to right with y, along the x axis, and conversely x along y. I've managed to change the axis but can't get the image to rotate appropriately any ideas?
2 个评论
Image Analyst
2018-8-17
imrotate()?
Star Strider
2018-8-21
Please do not close questions that have an answer.
回答（1 个）
Star Strider
2018-8-17
It would help to know how you calculated your data, and what you’re plotting. Rotating the plot might be as simple as reversing the order of your independent variable matrices, and either transposing ‘Z’ or letting contourf default to the correct orientation.
Example —
x = linspace(0, 0.35, 75); % Create Data
y = linspace(0, 0.2, 50); % Create Data
[X,Y] = meshgrid(x,y); % Create Data
Z = sin(X*3*pi) .* exp(-0.5*Y); % Create Data
figure(1)
contourf(x, y, Z) % ‘Normal’ Orientation (Vectors)
colorbar
figure(2)
contourf(X, Y, Z) % ‘Normal’ Orientation (Matrices)
colorbar
figure(3)
contourf(y, x, Z') % ‘Rotated’ Orientation (Vectors)
colorbar
figure(4)
contourf(Y, X, Z) % ‘Rotated’ Orientation (Matrices)
colorbar
I use meshgrid here. It produces different output matrices from those ndgrid would produce, so you may need to experiment with this if you used other functions.
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