<number of ties>

hi,

I would like to how to count the number of ties in a vector or matrix picking a column at a time,(ie any type of array)

R> x <- c(1,1,1:10)
R> duplicated(x)
 [1] FALSE  TRUE  TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
FALSE
R> sum(duplicated(x))
[1] 2
R> 

and apply and friends for matrices. A subject would be helpful ...

Torsten

themba

 



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