[R] truncating values into separate categories

PDXRugger J_R_36 at hotmail.com
Fri Jul 31 01:53:42 CEST 2009


Hi all, 
  Simple question which i thought i had the answer but it isnt so simple for
some reason.  I am sure someone can easily help.  I would like to categorize
the values in NP into 1 of the five values in "Per", with the last
category("4") representing values >=4(hence 4:max(NP)).  The problem is that
R is reading max(NP) as multiple values instead of range so the lengths of
the labels and the breaks are not matching.  Suggestions?

Per <- c("NA", "1", "2", "3","4")

NP=c(1 ,1 ,2 ,1, 1 ,2 ,2 ,1 ,4 ,1 ,0 ,5 ,3 ,3 ,1 ,5 ,3, 5, 1, 6, 1, 2, 2, 2,
4, 4, 1, 2, 1, 3, 3, 1 ,2 ,2 ,1 ,2, 1, 2,
2, 3, 1, 1, 4, 4, 1, 1, 1, 2, 2, 2)

Person_CAT <- cut(NP, breaks=c(0,1,2,3,4:max(NP)), labels=Per)

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