Generate plot of surface colored by the maximum error

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Yassine El Baaj 2021-10-9

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1470201-generate-plot-of-surface-colored-by-the-maximum-error

编辑： Yassine El Baaj 2021-10-9

Hello everyone,

I am currently working on a numerical algorithm for the approximation of 3D functions ( namely f(x,y,z) ). The algorithm works fine. Following is the final result/plot:

However, I do not want the plot to be displayed like that, I would like to plot it like this:

so that I can observe the maximum error and where it is located.

I already have the plot function that generates the second image, this is however a routine for 2D functions and I can't manage to write a 3D version of it. Following is the code:

function PlotSurf(xe,ye,Pf ,neval,exact,maxerr,fview)
figure
Pfplot = surf(xe,ye,reshape(Pf,neval,neval), reshape(abs(Pf-exact),neval,neval));
set(Pfplot,'FaceColor' ,'interp','EdgeColor','none');
[cmin cmax] = caxis;
caxis([cmin-.25*maxerr cmax]);
view(fview);
colormap hsv
vcb = colorbar('vert');
ylim(vcb, [0 maxerr])
set(get(vcb,'YLabel'),'String','Error')