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2009 Nov 30
2
Ggplot2: Elegant Graphics for Data Analysis (Use R) (2009 Paperback)
Is this book worth its dollar? If so, why?, if not, why not?
Cheers.
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2012 Oct 22
1
how to group smooth line by two groups?
Hello, I have the following sample dataset.
sex <- as.factor(c(rep(0,12),rep(1,12)))
char <-