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e_v_a

2 Posts
Posted - 05/01/2014 :  3:18:09 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hi,

I use a contour map to display a large amount of data (approx. 600000 points). The plot looks fine except that I get loads of spikes.



I guess this comes from data points that lie farther away from the rest of the points in that area. Can I specify something like a maximum distance of points to include in one area?

Anything else I can do to avoid the spikes?

Thank you!

Origin Ver. and Service Release: OriginPro 9.1.0G SR1
Operating System: Windows XP

Hideo Fujii

USA
1582 Posts
Posted - 05/02/2014 :  10:04:27 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi e_v_a,

Just I was thinking...

For me, your plot doesn't look like a "contour", but rather like a scatter to show the point density without contour lines (or ill connected ones). Have you made this plot from a XYZ worksheet, not from a matrix? Not sure if workable, but have you also tried to convert XYZ worksheet to a matrix by random (if your data points are not regular) gridding? If not, maybe it's worth to experiment so, I guess.

--Hideo Fujii
OriginLab
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