The B=0 option should create all permutations: B: The number of permutations. For a complete enumeration, `B' should be 0 (zero) or any number not less than the total number of permutations. ********************************************************************** ********* Richard P. Beyer, Ph.D. University of Washington Tel.:(206) 616 7378 Env. & Occ. Health Sci. , Box 354695 Fax: (206) 685 4696 4225 Roosevelt Way NE, # 100 Seattle, WA 98105-6099 ********************************************************************** ********* On Fri, 27 Jun 2003, Vincent Carey 525-2265 wrote: > > > I get an error when trying to use mt.sample.label: > > > > RGui: Rgui.exe - Application Error > > The instruction at "0x113d1734" referenced memory at "0x00000000". The memory could not be "written". Click on OK to terminate the program... > > > > I am using R 1.7.1, multtest 1.0.2, windows 2000. Here is the code that generates this fatal error > > > > library(multtest) > > vg <- c(0,1,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,1,0) > > vgAll <- mt.sample.label(vg,B=0) > > i reproduced this on XP, same versions. the problem is that > the C code is not coping with B=0. nor is it clear what B=0 > is intended to do. it seems that if B=1 then you get back > vg. if you want a single permutation of vg, use > sample(vg,size=length(vg),replace=FALSE) > >