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Error triangulating data when opening XYZ 3D data

 
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dcl9000



Joined: 28 Mar 2011
Posts: 26

PostPosted: Wed Sep 27, 2017 4:23 pm    Post subject: Error triangulating data when opening XYZ 3D data Reply with quote

Hi! I'm trying to open a large (~ 1GB) XYZ 3D data to generate a contour plot. This message "Error triangulating data" pops up in the middle and DPlot failed to plot anything afterwards.

Could you please give me a clue to plot my data? There's no issue at all when plotting relatively small XYZ data files. I'm running DPlot on 64-bit Windows7 and there's 4GB memory available. Thanks!
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DPlotAdmin
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Joined: 24 Jun 2003
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Location: Vicksburg, Mississippi

PostPosted: Wed Sep 27, 2017 7:05 pm    Post subject: Reply with quote

The "error triangulating data" is most likely due to insufficient memory (but is poorly explained).

Your 1Gb file likely contains in the neighborhood of 20 million points, and that will be too many.
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David Hyde
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dcl9000



Joined: 28 Mar 2011
Posts: 26

PostPosted: Mon Dec 18, 2017 8:21 pm    Post subject: Error triangulating data when opening XYZ 3D data Reply with quote

David,

I thought DPlot can handle many millions of data points as long as the total memory needed won't exceed 2G.


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PostPosted: Fri Aug 26, 2005 9:49 am
Post subject:

You're welcome. But just so we're clear: the limitation here isn't so much DPlot as it is your available memory. If you had the memory for 138 million points (16 bytes/point) DPlot would work with it just fine. You can try forcing Windows to use a larger chunk of your hard disk for virtual memory and it will probably work, though it will be so slow that you'll most likely find it to be useless.
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David Hyde
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Posted: Fri Aug 26, 2005 12:47 pm
Post subject:

First... I misspoke earlier and I need to rewrite some of my documentation. DPlot will fail to allocate memory for an array that requires more than 2Gb. So in effect the limit is 1/8 what I said before: 2147483648/(8 bytes per X or Y) = 268,435,456 points total for all curves.

.....
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