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...ercy and if there is any way to make this possible, I would be very grateful. To control & replace random number streams, it really is necessary to alter the workspace. That's where the random generator state is stored. It is acknowledged in Robert Gentleman' s Book, R Programming for Bionformatics "The decision to have these [random generator] functions manipulate a global variable, .Random.seed, is slightly unfortunate as it makes it somewhat more difficult to manage several different random number streams simultaneously? (Gentleman, 2009, p. 201). I have developed an understandable s...

...ther, when I tried to invoke R, I had \ Warning message: In normalizePath(c(new, .Library.site, .Library), "/") : path[1]="": No such file or directory I looked through all the document but could not find an answer. Could you please provide some hint? Thanks! Jianying Li Bionformatics Scientist, Contractor National Institute of Environmental Health Sciences Li11@niehs.nih.gov<mailto:Li11@niehs.nih.gov> (919) 541 - 5736 [[alternative HTML version deleted]]