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Gives a one-to-one mapping from unique observations to rows of a data matrix.
partuniq(x)
A vector of length nrow(x) with integer entries. An observation
nrow(x)
k is assigned an integer i whenever observation i
k
i
is the first row of x that is identical to observation k
x
(note that i <= k).
i <= k
Matrix of observations.
partconv
set.seed(0) mat <- data.frame(lets = sample(LETTERS[1:2],9,TRUE), nums = sample(1:2,9,TRUE)) mat ans <- partuniq(mat) ans partconv(ans,consec=TRUE)
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