[Numpy-discussion] effectively computing variograms with numpy

Hanno Klemm klemm@phys.ethz...
Mon Jun 25 16:09:02 CDT 2007


I will try and dig a bit more in the literature, maybe I find something.

Hanno


On Jun 25, 2007, at 4:59 PM, Timothy Hochberg wrote:

>
>
>
> On 6/25/07, Hanno Klemm < klemm@phys.ethz.ch> wrote:
>> Tim,
>>
>> Thank you very much, the code does what's it expected to do.
>> Unfortunately the thing is still pretty slow on large data sets.
> This does seem like the kind of thing that there should be a faster 
> way to compute, particularly since you are binning the results up. One 
> approach would be to just bin the data before doing the computation, 
> however, that loses a lot of accuracy. It does seem like there should 
> be some moment-like approach that would allow you to bin the data 
> before you do the computation, computing the first and second moments, 
> or something similar and then computing the results from the binned 
> moments. I don't know that that would work -- it's just a vague hunch. 
> I don't know if I'll have time to try it out, but I thought I would 
> mention it.
>  
>
>
>
>
>
> Your welcome, I hope this helps some.
>
> Regards,
>
> -- 
> .  __
> .   |-\
> .
> .  tim.hochberg@ieee.org
>
>
> [SNIP]
>
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-- 
Hanno Klemm	
hanno.klemm@xs4all.nl
http://www.mth.kcl.ac.uk/~klemm



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