This may or may not be related, but looking at the random number generators in Numerical Recipies In C book it would appear that random number generators with identical seeds will give different results depending upon whther they are compliled with 64 bit or 32 bit settings.
Is this the case with the random number generators in R? Phineas Campbell >>> Chang-Heok Soh <[EMAIL PROTECTED]> 02/10/05 8:44 AM >>> Hello, I ran my simulations on the Unix verson of R1.9.1 and the Windows version of R2.0.1 on XP. I kept getting different values for the mean of the same column of the same matrix, and am perplexed. I would appreciate if anyone could help explain the difference? Here is a sample code: set.seed(7293) z1v <- rnorm(1000, mean=68, sd=13) z1v <- (z1v-mean(z1v))/sd(z1v) Using R1.9.1 on Unix, I get: mean(z1v) [1] -4.88775e-15 Using R2.0.1 on Windows XP, I get: mean(z1v) [1] -3.7497e-16 The same problem occurs when I dump the data from one version and then source it using the other version. Thanks for the help. Regards, Chang-Heok ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html