Rotation of a contour plot

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Mahi Nazir 2014-7-9

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评论： Mattalabba 2018-11-15

I have a contour plot (Image1). I need to rotate it through a certain angle. If I save it as an image and then rotate it using transformation(or rotation) matrix, the whole plot including the axes are rotated(Image2). If I use imrotate for the matrix I have of the contour, the resultant contour doesn't actually rotate by the same angle which I specify (37 deg in the example, Image3) and more over sometimes the width of the plot decreases.

Can someone please help me overcome the problem. I want rotation of the contour plot without reducing the width and rotating exactly by the specified angle. Is it the aliasing effect?

Any help will be much appreciated. Many Thanks

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采纳的回答

Grzegorz Knor 2014-7-9

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在 MATLAB Online 中打开

Look at this example:

a = 37;
[x,y] = meshgrid(linspace(-4,4,30));
z = exp(-x.^2/15-y.^2);
contour(x,y,z)
xlim([-5 5])
ylim([-5 5])
x = x*cosd(a) - y*sind(a);
y = y*cosd(a) + x*sind(a);
figure
contour(x,y,z)
xlim([-5 5])
ylim([-5 5])