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Re: 2D Pearson correlation coefficient [message #87390 is a reply to message #87385]

Thu, 30 January 2014 10:12

limiqt
Messages: 27
Registered: October 2013

Junior Member

I wonder if someone have a suggestion about how to determine the wi (weighting) factor.
Thanks,
Lim

On Thursday, January 30, 2014 9:43:54 AM UTC-5, Lim wrote:
> Dear all,
>
> I would like to ask if someone know a code to calculate a 2D Pearson correlation as:
>
>
>
> r^2=(Sum wi*(Mi-M)*(Oi-O))^2 /((Sum wi*(Mi-M)^2)*(Sum wi*(Oi-O)^2))
>
>
>
> Sum runs from i=1 to N. N is the total number of grid cells.
>
> Mi and Oi are the values in the grid cell i and wi is a normalized weight (area) of grid cell i. Sum wi=1 (Sum from i=1 to N).
>
>
>
> IDL has C_Correlate and R_correlate but none of them include the wi factor.
>
>
>
> I will appreciate any assistance.
>
>
>
> Lim

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[Message index]

		2D Pearson correlation coefficient By: limiqt on Thu, 30 January 2014 06:43
		Re: 2D Pearson correlation coefficient By: Matthew Argall on Thu, 30 January 2014 07:08
		Re: 2D Pearson correlation coefficient By: limiqt on Thu, 30 January 2014 10:12
		Re: 2D Pearson correlation coefficient By: David Fanning on Thu, 30 January 2014 10:20
		Re: 2D Pearson correlation coefficient By: Craig Markwardt on Thu, 30 January 2014 17:35
		Re: 2D Pearson correlation coefficient By: David Fanning on Thu, 30 January 2014 17:46
		Re: 2D Pearson correlation coefficient By: David Fanning on Thu, 30 January 2014 17:52
		Re: 2D Pearson correlation coefficient By: Russell Ryan on Thu, 30 January 2014 21:14
		Re: 2D Pearson correlation coefficient By: David Fanning on Fri, 31 January 2014 05:12
		Re: 2D Pearson correlation coefficient By: limiqt on Fri, 31 January 2014 01:14
		Re: 2D Pearson correlation coefficient By: robinson.inj on Fri, 31 January 2014 03:09
		Re: 2D Pearson correlation coefficient By: Phillip Bitzer on Fri, 31 January 2014 08:11

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