Re: [R] bootstrap means by strata

Answering my own question. ?sample (!) y <- by(x, x$TrSeasYr, function(x) mean(sample(x[,1], size=999, replace = TRUE))) >>> Tim Howard 10/13/2011 9:42 AM >>> All - I have an uneven set of replicates and would like to sample from this set X number of times to generate a mean for each groupi

[R] bootstrap means by strata

All - I have an uneven set of replicates and would like to sample from this set X number of times to generate a mean for each grouping variable. I was thinking the boot package would be the thing to use, but now I'm not so sure ... given the discussion here: http://finzi.psych.upenn.edu/Rhel