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 Contour plots of rastered data?		  New Topic  Reply to Topic
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lisa_001

2 Posts
Posted - 07/03/2009 :  12:12:44 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. 7.5 SR 6:
Operating System: Windows

Hi,

I am trying to make contour plots of regularly-spaced rastered data. (collected line by line) Origin says the data is not regular and so I can only use the Random XYZ conversion to create the matrix. Is there a way to convert the rastered data without having to use a method that is interpolating my (x,y) data points?

Thanks,
Lisa

easwar

USA
1964 Posts
Posted - 07/05/2009 :  7:27:56 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Lisa,

Origin version 8.0 allows plotting contour graphs directly from XYZ data where the X,Y do not need to be regularly spaced. No intermediate matrix is created and the contour is computed using triangulation:

http://originlab.com/www/helponline/Origin8/en/graphing/a_note_about_contour_graphs.htm

You can try this with your data by downloading the Origin 8 demo.

Easwar
OriginLab
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lisa_001

2 Posts
Posted - 07/06/2009 :  11:24:27 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Thanks for the info. I'll try the demo.

Lisa
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RichT

3 Posts
Posted - 07/15/2009 :  11:11:15 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
I've occasionally found that depending on the ordering of data Origin had problems recognizing it as regular, so might be worth sorting your worksheet first just in case.
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