a list of ggplot objects that plot of the double mass curves of each station in the SILO list against each other. The double mass plot is on the bottom diagonal, and the slope of the line for each case in the upper diagonal. Each list element contains plotsperpage (default to 4) double mass plots, to allow them to be plotted on multiple pages
Arguments
SILO
a list of sites with SILO data, as created by SILOLoad()
filename
optional, filename to write the plot to, including extension. Filename can include full path or sub folders.
plotsperpage
optional, number of plots to output per element of the list returned. Defaults to 4