3D graphs

[RMWalls]

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.

[wayne]

Could you post the sheet?

[RMWalls]

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

[wayne]

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.

[VladimirN]

If you want to create a 3D surface, then you need to use "SurfacePlot" (or hotkey "Ctrl +2") from the toolbar "Graph".

P.S. You used "Contour Plot" in your Mathcad worksheet.

[ValeryOchkov]

VladimirN. wrote:

If you want to create a 3D surface, then you need to use "SurfacePlot" (or hotkey "Ctrl +2") from the toolbar "Graph".

P.S. You used "Contour Plot" in your Mathcad worksheet.

We can transform an exited Contour Plot into Surface plot! By hepl the format gialog box!

[RMWalls]

Thank you all for the comments, particularly how to scale the axes. The solution to getting a surface plot to appear I found from a previous thread which appeared in the list of associated items. It seems I have to turn off the border because I have an ATI graphics card. Obviously this is a new bug for 15 because I did not have the problem in 14. I am surprised it has not been fixed.

[PhilipOakley]

The graphics card issue is a Windows compatibility issue : see blank 3d plot