How do I export XYZ data from CreateMesh?

Forum|Forum|3 years ago
December 27, 2022
3 replies
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How do I export XYZ data from CreateMesh? I am exporting data from a Mathcad Prime 3D surface plot to a graphics program which will allow me to color code the surface based upon the Z values.

1_Henderson-Hasslebach-3D.zip

Best answer by Werner_E

The data structure suggested by Terry can be easily created in Prime and then exported to Excel in one go:

And you may even create the plot in Excel but it would need some more additional work to have it using a better color scheme and more meaningful scales.

W

Werner_E

25-Diamond I

Which data structure is needed by the external graphics program?

CreateMesh creates a nested matrix. Its a 3 x 1 matrix and the elements are n x m matrices with the x, y and z values of the surface points. Furthermore this structure also defines automatically the quadrilateral "patches" the surface consists of.

It would be easy to write a small program to export a 3-column matrix with n * m elements consisting of all the points of the surface, but how would an external program know which four points create a side face of the surface?

So once you know the data structure needed for your external program, it may be possible to write a Mathcad program to create and export that structure.

I guess most programs won't understand the structure READPRN creates

Real Mathcad of course does:

W

Werner_E

25-Diamond I

Real Mathcad even makes a good job if only provided a simple linear point list without any information about side faces.

In Prime:

In Mathcad

But again - you'll have to know which data structure your external program needs.

T

terryhendicott

21-Topaz II

Hi,

Export the three nested matrices in M as separate Excel files.

Most graphical packages can handle Excel files.

For example ORIGIN with a simple rearrangement in Excel gets this:

Cheers

Terry

W

Werner_E

Answer

25-Diamond I

The data structure suggested by Terry can be easily created in Prime and then exported to Excel in one go:

And you may even create the plot in Excel but it would need some more additional work to have it using a better color scheme and more meaningful scales.