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2 messages · tomsv193@student.liu.se, Brian Ripley

Original
tomsv193@student.liu.se
# 
Hi!

Why is the rows-indicies effected by ordering? 
Example:

(data=)
  name   age
1 peter  13
2 eric   15
3 daniel 14 

#ordering by name...

  name   age
3 daniel 14
2 eric   15
1 peter  13

why not:

  name   age
1 daniel 14
2 eric   15
3 peter  13

Does it effect other operations? data[,1] really gives the 1:st row, 
but when data is printed it says that the first row have index 3...


/Tomas




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Brian Ripley
#
On Tue, 3 Jul 2001 tomsv193 at student.liu.se wrote:

            

      
      
      
    

        
Those are row names, not row indices.

            

      
      
      
    

        
*row name* 3.  Indices are printed like [3,] as in

            

      
      
      
    

        
[,1] [,2] [,3]
[1,]    1    4    7
[2,]    2    5    8
[3,]    3    6    9


Try a data frame like swiss with real names (in 1.3.0) rather than names
which happen to be 1:nrow(df).