If RFpar is called without arguments, the current list is
returned.If RFpar is called with NULL only, the current list is
deleted.Otherwise the arguments are stored for global use in RandomFields.
RFoptions(seed=0) ## *ANY* simulation will have the random seed 0; set## RFoptions(seed=NA) to make them all random againRFpar(col="red")
plot(RMexp())