Bootstrap Confidence Intervals in R

r confidence-interval statistics-bootstrap
mike picture mike · Feb 16, 2012 · Viewed 7.4k times · Source

I am a new R user, and am having trouble using the boot package. All I want to do is use bootstrapping to produce confidence intervals around a mean for a vector of numbers, such as:

x <- rnorm(100, 1, .5)

Any tips?

Answer

Vincent Zoonekynd picture Vincent Zoonekynd · Feb 16, 2012

Doesn't the following suffice?

library(boot)
x <- rnorm(100, 1, .5)
b <- boot(x, function(u,i) mean(u[i]), R = 999)
boot.ci(b, type = c("norm", "basic", "perc"))

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