[R] Langelier-Ludwig Plots

[Rich Shepard]

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