plotArgs to list of listsInternal function. Take the inputs as plotArgs to the Plot function, and make
them a list of length numSpadesPlotObjects entries of lists.
.makeList(plotArgs, numSpadesPlotObjects)# S4 method for list
.makeList(plotArgs, numSpadesPlotObjects)
list. Any arguments that the the grid package can accept for the specific grob types, e.g., rasterGrob, polygonGrob, etc.
Numeric. The number of .spadesPlotObjects.
This can't easily be deduced from the plotArgs because
of the RasterStacks. So passed manually.