[Paraview] Correlation coefficient

[Patrick O'Leary]

standard deviation = sqrt(M2 - M1^2) where M1 is the mean.

I hope this helps.
Patrick

On Sat, Apr 29, 2017 at 12:18 PM Rupert Gladstone <
rupertgladstone1972 at gmail.com> wrote:

> Hi, I'd like to calculate a correlation coefficient between two variables
> in a vtu data set.  I am not experienced with statistics but the Pearson
> correlation coefficient looks suitable.  So I just need the covariance and
> standard deviations.
>
> The Paraview Multicorrelative Statistics filter seems to give the
> covariance, but I can't find a filter that gives the standard deviation.
> The Descriptive Statistics filter is supposed to give standard deviation
> according to the documentation, but I am not getting it when I run the
> filter.  I am referring to this documentation:
> http://www.paraview.org/Wiki/Statistical_analysis
>
> I am currently running both paraview 4.0.1 and 5.0.0.  They give slightly
> different outputs from the statistics filters, but neither gives me the
> standard deviation (unless it is hidden in M2, M3 or M4?  I don't know what
> these are).
>
> Can anyone help with either my lack of standard deviation or an
> alternative way to calculate a correlation coefficient?
>
> Thanks,
> Rupert Gladstone
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