Plotting curvature of a surface

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AB el 1 de Sept. de 2017

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https://es.mathworks.com/matlabcentral/answers/354922-plotting-curvature-of-a-surface

Editada: Walter Roberson el 2 de Sept. de 2017

surface.m

Hello, I am trying to plot the curvature of the surface (attached) using patch_curvature https://www.mathworks.com/matlabcentral/fileexchange/32573-patch-curvature

I get the following error when I run it:

> In patchcurvature>VectorRotationMatrix (line 246)
  In patchcurvature (line 94) 
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN. 
> In patchcurvature>VectorRotationMatrix (line 246)
  In patchcurvature (line 94) 
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN. 
> In patchcurvature>VectorRotationMatrix (line 246)
  In patchcurvature (line 94) 
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN. 
> In patchcurvature>VectorRotationMatrix (line 246)
  In patchcurvature (line 94) 
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN. 
> In patchcurvature>VectorRotationMatrix (line 246)
  In patchcurvature (line 94)