[gmx-users] Correlation-Covariance

[Tsjerk Wassenaar]

Hi,

Otherwise, divide every element ij by sqrt(ii)*sqrt(jj).

Cheers,

Tsjerk

On Wed, Jul 30, 2008 at 4:44 PM, Ran Friedman <r.friedman at bioc.uzh.ch> wrote:
> I made a modified version of g_covar that has this capability. I'll put it
> in the user contributions later today.
>
> Ran.
>
> Dhananjay wrote:
>
> Hello all,
>
> I have done MD simulation of protein and using trajectories I did covariance
> analysis. Using program g_covar with -ascii option a row covariance matrix
> have been generated.
>
> However, I an interested in Correlation matrix instead of Covariance.
>
> Can any one tell me how to convert the covariance matrix into correlation
> matrix or what is the relation between covariance and correlation matrix.
>
> I am not good in programming or mathematics, but if anyone could help me and
> give me some direction, I will be happy to write own program/script.
>
>
> Thanking you in advance,
>
>
> -- Dhananjay
>
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> --
> ------------------------------------------------------
> Ran Friedman
> Postdoctoral Fellow
> Computational Structural Biology Group (A. Caflisch)
> Department of Biochemistry
> University of Zurich
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-- 
Tsjerk A. Wassenaar, Ph.D.
Junior UD (post-doc)
Biomolecular NMR, Bijvoet Center
Utrecht University
Padualaan 8
3584 CH Utrecht
The Netherlands
P: +31-30-2539931
F: +31-30-2537623