[R] pair correlation function of 3D points

Abby Spurdle @purd|e@@ @end|ng |rom gm@||@com
Wed Apr 29 00:07:39 CEST 2020

I haven't attempted this.
(Mainly because I'm not familiar with the theory surrounding it).

However, I looked at the documentation for the spatstat package.
There are are several functions prefixed with pcf, including one named pcf3est.
According to its description field:

          Estimates the pair correlation function
          from a three-dimensional point pattern.

*If* it does what it claims, would that solve your problem?

Note (to spatstat authors):

I'm not convinced this package is well documented.
In fact, I'm not even convinced it meets CRAN standards, which require
functions to have their arguments documented.

    Three-dimensional point pattern (object of class "pp3").

Nowhere in the help page, does it say what a pp3 object is, or how to
create it, or where to find that information.
Potentially requiring a user to search through a 1766 page document
for the answer.
(Yes, I know there's a function named pp3, but I don't think that's
good enough).

If people are not going to document their packages properly, they
could try a little bit harder to answer R-help questions that involve
their packages...

On Tue, Apr 28, 2020 at 3:56 AM Labo Eric <leroy using icmpe.cnrs.fr> wrote:
> Hi,
> I have the coordinates of 3D points and I want to plot the pair
> correlation function of these points
> (https://en.wikipedia.org/wiki/Radial_distribution_function). I wonder
> if it possible to calculate this function with R. Maybe with the
> spatstat library? I tried but I found the way to do this with 3D points
> but not for 3D points.
> Could you help me ?
> Thank you,
> Best regards,
> --
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