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# Goal: R syntax where model specification is an argument to a function.
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# Invent a dataset
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x <- runif(100); y <- runif(100); z <- 2 + 3*x + 4*y + rnorm(100)
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D <- data.frame(x=x, y=y, z=z)
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amodel <- function(modelstring) {
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summary(lm(modelstring, D))
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}
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amodel(z ~ x)
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amodel(z ~ y) |