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2008 Dec 03
1
help on tapply using sample with differing sample-sizes
...sort(weight) sdatavarwght <- sdatavar*sweight # stramn <- tapply(sdatavar, sstratavar, mean) meanvect <- rep(0, times = nboot) stratasize <- tapply(sdatavarwght, sstratavar, length) stratasizemone <- stratasize -1 while (i < nboot) { #vector of resampled observations vectobsrestemp <- tapply(sdatavarwght, sstratavar, sample, replace = T, size = stratasizemone) vectobsres <- unlist(vectobsrestemp) meanvect[i] <- mean(vectobsres) i <- i + 1 } repvectboot <- rep(mean(meanvect), times = i) vb <- sum((repvectboot - meanvect)^2)/(i -1) lwrbndmnp &lt...