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RMWalls1-Visitor
1-Visitor
September 20, 2011
Question

3D graphs

  • September 20, 2011
  • 7 replies
  • 4359 views

I have just tried to get a surface plot for a small matrix in Mathcad 15. It will only show me it as a contour map or a vector field. I think this is the first time I;ve done this since upgrading from 14. So I loaded a file which I had created in 14 and had the same response. Is this a bug or a known problem ? Any advice please.

7 replies

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wayne12-Amethyst
12-Amethyst
September 20, 2011

Could you post the sheet?

R
RMWalls1-VisitorAuthor
1-Visitor
September 20, 2011

Thanks in advance. The sheet is attached, having cleared out some extraneous calcs. The problem graph is at the end.

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wayne12-Amethyst
12-Amethyst
September 21, 2011

Robin,

I did not have any trouble, except because of the units, scaled the graph.

If you plot one 2D matrix, the Mathcad plots element i,j against x=i and y=j. So you can't add your own scale.

To plot correctly, you need to make a nested matrix of X, Y and Z values. There is an one to one correspondence,

Xi,j andYi,j and Zi,j. So you just need to expand the x and y matrices.

See attached.

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