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18 lines
475 B
R
18 lines
475 B
R
# Goal: To do sorting.
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#
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# The approach here needs to be explained. If `i' is a vector of
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# integers, then the data frame D[i,] picks up rows from D based
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# on the values found in `i'.
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#
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# The order() function makes an integer vector which is a correct
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# ordering for the purpose of sorting.
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D <- data.frame(x=c(1,2,3,1), y=c(7,19,2,2))
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D
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# Sort on x
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indexes <- order(D$x)
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D[indexes,]
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# Print out sorted dataset, sorted in reverse by y
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D[rev(order(D$y)),] |