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Question: Ignore data in matrix when using plots[matrixplot]?

Question:Ignore data in matrix when using plots[matrixplot]?

javy 5 Maple 13
matrixplot surface
September 03 2011
1

Hello all,

I have been able to plot data points onto a surface using plots[matrixplot]. I would like to display a circular geometry with changes in magnitude in the Z-axis. For Example if I had the following matrix:

0 0 1 1 0 0 

0 1 1 1 1 0

0 1 2 2 1 0

0 1 1 1 1 0

0 0 1 1 0 0

I would like  the zero elements to be ignored in the plot as they are not defined.

I was hoping I could provide a special character (such as NULL) in the matrix so that matrixplot ignores the data but have been unsucessful. In origin I can provide a "--" and the data is ignored.

Here is a plot. You can see the circular geometry but at the 4 corners of the x-y plane you have data which I would like removed. Any ideas?

 
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