[PATCH] Another pm3d corners2color function

[Clement L. <the...@gm...>]

Hello,

I think the previous email was swallowed by the mailing list due to
the attachment. I've written up another pm3d corners2color function.
It works just as
the others, i.e.,

set pm3d corners2color rms

rms4 takes the root mean square[1] of the four corners

The RMS has many physical interpretations [2]. Later on, I may write a
similar function for standard deviation...

My field of research is computational (statistical) physics. I make
heavy use of pm3d to represent three variable systems. As such, more
corners2color functions will come in useful.

The patch[3] I've attached here was generated as advised using diff -ur
/orig/source/tree/ /my/source/tree/

Clement Law

[1] http://en.wikipedia.org/wiki/Root_mean_square
[2] http://en.wikipedia.org/wiki/Root_mean_square#Uses
[3] http://pastebin.com/7FrVVr4p