Variance for Vector of Constants is Not Zero
Could you please provide "sessionInfo()"; I can't replicate the problem: > var(x) [1] 0 > sessionInfo() R version 2.2.1, 2005-12-20, i386-pc-mingw32 attached base packages: [1] "methods" "stats" "graphics" "grDevices" "utils" "datasets" [7] "base" spencer graves
Barry Zajdlik wrote:
Hi All, An annoying but not critical problem I am having is that the variance of a vector of constants is reported as > 0. I imagine there is a simple workaround for the following but could not find it after having spent an embarrassing amount of time. In Splus:
x<-rep(0.02,10) var(x) 0
In R: x<-rep(0.02,10) var(x) 1.337451e-35 I assumed the problem had to do with machine precision and suitably modified .Machine$double.eps and .Machine$double.neg.eps which I thought would fix the problem but without success. Any pointers to a solution would be appreciated! Cheers, Barry Zajdlik
______________________________________________ R-help at 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