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Re: More Kriging Problems [message #86185 is a reply to message #86181]

Wed, 16 October 2013 21:22

chris_torrence@NOSPAM is currently offline

chris_torrence@NOSPAM
Messages: 528
Registered: March 2007

Senior Member

Hi David,

I think I see the problem. In my latest krig2d.pro code, I am incorrectly calculating the X and Y arrays for the /REGULAR grid case. Near the end of the code are the following lines:
xx = (SIZE(x, /N_DIM) eq 2) ? x : REBIN(TRANSPOSE(x), nx, n)
yy = (SIZE(y, /N_DIM) eq 2) ? y : REBIN(TRANSPOSE(y), nx, n)

They should be:
xx = REBIN(REFORM(x, 1, n), nx, n)
yy = REBIN(REFORM(y, 1, n), nx, n)

Do you want to make the changes to the code, and see what kind of results you get? Also, I would be curious as to your speed test results. I tried your cgkrig2d code, and it seemed about the same or maybe slightly slower. Finally, the cgkrig2d results didn't quite match what I was expecting. Here is the code I used:
values = Dist(11)
smdims = Size(values, /Dimension)
sampled2 = cgKrig2d(values, findgen(smdims[0]), $
findgen(smdims[1]), /Regular, Spherical=[5.0, 0.0])
sampled3 = Krig2d(values, findgen(smdims[0]), $
findgen(smdims[1]), /Regular, Spherical=[5.0, 0.0])
s2 = surface(sampled2, window_title='cgKrig2D')
s3 = surface(sampled3, window_title='new Krig2D')

Note that the call to Krig2D is my latest fast code with the 2-line fix mentioned above.

Thanks for catching this!
-Chris
VIS

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[Message index]

		More Kriging Problems By: David Fanning on Wed, 16 October 2013 18:42
		Re: More Kriging Problems By: chris_torrence@NOSPAM on Wed, 16 October 2013 21:22
		Re: More Kriging Problems By: David Fanning on Wed, 16 October 2013 21:25
		Re: More Kriging Problems By: David Fanning on Thu, 17 October 2013 06:01
		Re: More Kriging Problems By: David Fanning on Thu, 17 October 2013 06:24

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