How to plot a 3D contour plot when the contours is a forth vector

Hello,

I have a set of data X,Y,Z,A. I would like to plot A in 3D. Not sure how to proceed.

It would be nice to have contour plots for A as a function of x,y,z

Is this possible?

Thank you

Answer 1

[Star Strider]

Use the contour3 function. If ‘A’ is a list of the contour levels, all the MATLAB contour functions accommodate defining the contour levels in a vector. The contour3 function can be used in conjunction with surf (or surfc) to plot them on the surface. Use the hold function to do that.

[Robert Jones]

No, A is not the contour levels.

Say X,Y,Z are coordinates, and A are the temperatures at the XYZ points

[Robert Jones]

the contours should represent equal temperature

[Star Strider]

I was considering something like this —

[X,Y] = ndgrid(-5:0.1:5);
Z = exp(-(X.^2+Y.^2)*0.2)*50;
A = sort(rand(15,1))*30+10

A = 15x1

11.1544 15.1121 15.8346 16.1930 19.3858 24.0779 28.4907 28.5324 29.8759 30.5134

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figure
surf(X,Y,Z, 'EdgeColor','interp', 'FaceColor','interp')
hold on
contour3(X, Y, Z, A, '-k')
hold off
colormap(turbo)
hcb = colorbar;
hcb.Label.String = '°C';

.

[Robert Jones]

Thanks, will try

[Star Strider]

My pleasure!