R help - Jul 2015 - Langelier-Ludwig Plots

My web search for an R package producing Langelier-Ludwig plots found no
hits. Has this been implemented in base graphics, lattice, ggplot2, or
another package?

   The reference:

Langelier, W., and Ludwig, H., 1942, Graphical methods for indicating the
mineral character of natural waters: J. Am. Water Ass., 34, p. 335-352.

Rich

According to  ...
   http://info.ngwa.org/gwol/pdf/721000139.PDF (Graphical Interpretation of
Water Quality Data)
... a Langelier-Ludwig plot is simply a scatterplot of cations vs. anions (in
percent).
Surely that would be beyond trivial to produce in R. Or am I missing a subtle
something?


Cheers,
B.



On Jul 22, 2015, at 11:50 AM, Rich Shepard <rshepard at appl-ecosys.com>
wrote:
>  My web search for an R package producing Langelier-Ludwig plots found no
> hits. Has this been implemented in base graphics, lattice, ggplot2, or
> another package?
> 
>  The reference:
> 
> Langelier, W., and Ludwig, H., 1942, Graphical methods for indicating the
> mineral character of natural waters: J. Am. Water Ass., 34, p. 335-352.
> 
> Rich
> 
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

On Wed, 22 Jul 2015, Boris Steipe wrote:
> According to  ...
>   http://info.ngwa.org/gwol/pdf/721000139.PDF (Graphical Interpretation of
Water Quality Data)
> ... a Langelier-Ludwig plot is simply a scatterplot of cations vs. anions
(in percent).
> Surely that would be beyond trivial to produce in R. Or am I missing a
subtle something?
Boris,

   Yes, that's what it is. I'll see just how trivial it is to produce it
in
the four-quadrant format I've seen used. It's a different layout from
the
basic two-variable scatterplot.

   Thanks for the URL. I worked from a reference in a 2003 paper to the
original 1942 paper.

Rich