21 lines
514 B
R
21 lines
514 B
R
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# for-loop version from Wikipedia
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# http://en.wikipedia.org/wiki/Bootstrapping_(statistics)
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data(iris)
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x <- iris[which(iris[,5] != "setosa"), c(1,5)]
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trials <- 10000
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intercept1 <- rep(0, trials)
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slope1 <- rep(0, trials)
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print(system.time(
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for (B in 1:trials) {
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ind <- sample(100, 100, replace=TRUE)
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result1 <- glm(x[ind,2]~x[ind,1], family=binomial(logit))
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intercept1[B] <- coefficients(result1)[1]
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slope1[B] <- coefficients(result1)[2]
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}
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))
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hist(intercept1, breaks=40)
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dev.new()
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hist(slope1, breaks=40)
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