Move a contour plot down to a specific z value?

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dylan
dylan 2013-5-12
回答： Angelo Yeo 2023-1-25
I want to move a contour plot down to a z=-4 value.
I have tried csurf, however that does not work, because it puts it all the way on the bottom, and it is not correctly in line with my surface for some reason.
Any help you can give would be appreciated.
]
]
function PlotSurface
[x,y] = meshgrid(-4:.05:4);
z = 3*(1-x).^2.*exp(-(x.^2) - (y+1).^2)- 10*(x/5 - x.^3 - y.^5).*exp(-x.^2-y.^2)- 1/3*exp(-(x+1).^2 - y.^2);
surf(x,y,z,'EdgeColor','none')
hold all
axis([-4,4,-4,4,-8,8])
contour(x,y,z,30) %%%%<< I want to move this to Z=-4 and it is on Z=0 now >>%%%
end
]
]
Dylan

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回答（3 个）

Tue Chasin
Tue Chasin 2014-8-6
  1 个评论
Jörg Bäuerle
Jörg Bäuerle 2015-3-27
The solution posted in that stackoverflow thread didn't work for me in Matlab 2015a. Does anybody have any other ideas how to move the contours down the z-axis?
Thanks a lot in advance, Joerg

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Walter Roberson
Walter Roberson 2013-5-12
Instead of supplying a scalar of the number of contours you want, you can provide a vector of the values at which you want the contour lines to be drawn.
Angelo Yeo
Angelo Yeo 2023-1-25
Ran in:
As of R2022b, consider the following example script:
x = -2:0.25:2;
y = x;
[X,Y] = meshgrid(x);
F1 = X.*exp(-X.^2-Y.^2);
figure;
surf(X, Y, F1);
hold on;
[~, h] = contour(X,Y,F1);
h.ZLocation = "zmin";
xlabel('x-axis'); ylabel('y-axis'); zlabel('z-axis')
grid on;

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