id<-c(1,1,1,1,3,3,3,7,7,7,7,11,11,11,2,2,2,4,4,4,4,8,8,8)
sort(id)
[1]  1  1  1  1  2  2  2  3  3  3  4  4  4  4  7  7  7  7  8  8  8 11 11 11



Quoting Manli Yan <[EMAIL PROTECTED]>:

  no,the id is  variable of a table,such as:
  treatment id  age response
    low         1   50   20
    low         1   60   30
    high        5   50   30
    high        5   60  40

.......

I want to rearranage the table according the id (increasing),since id is not
strictly from 1~n,it is in increasing order but sometime jump through many
number like 1 1 5 5,I like them to be 1 1 2 2~



2008/6/4 Erik Iverson <[EMAIL PROTECTED]>:

Are these the ranks of the data?

help.search("rank")



Manli Yan wrote:

   id<-c(1,1,1,1,3,3,3,7,7,7,7,11,11,11........)

how to sort  this kind of data to
  id:(1,1,1,1,2,2,2,3,3,3,3,4,4,4.........)

thanks~

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