nsplit
the number of splits in the condition dimension (one new plot window will be produced for each split, i.e. if you have 80 conditions and specify 4 splits you will get 4 plots with 20 conditions each).
newDevice
nsplit plots are created within the same device. In principle, most of the R
Graphical USer Interface will allow the user to navigate between the different
plots. However, if scripting only the last plot will be seen. If you want to
create new device for each different plot, then set this option to TRUE.