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33369
2006 Jan 24
9
Number of replications of a term
Hello,
Is there a simple and fast function that returns a vector of the number
of replications for each object of a vector ?
For example :
I have a vector of IDs :
ids <- c( "ID1", "ID2", "ID2", "ID3", "ID3","ID3", "ID5")
I want the function returns the following vector where each term is the
number of replicates for the