[R] How to change all name of variables

From: Muhammad Subianto <subianto_at_gmail.com>
Date: Thu 02 Jun 2005 - 21:04:28 EST


Dear R-helpers,
First I apologize if my question is quite simple I have a large datasets which more 100 variables. For a research I need to change all name of variables with add one or more letters on each variables.
For example,
> data(Pima.tr)
> Pima.tr[1:5,]

   npreg glu bp skin bmi ped age type

1     5  86 68   28 30.2 0.364  24   No
2     7 195 70   33 25.1 0.163  55  Yes
3     5  77 82   41 35.8 0.156  35   No
4     0 165 76   43 47.9 0.259  26   No
5     0 107 60   25 26.4 0.133  23   No

>
> dimnames(Pima.tr)[[2]]

[1] "npreg" "glu" "bp" "skin" "bmi" "ped" "age" "type"
>

I need to change the variables name ,
"npreg" "glu" "bp" "skin" "bmi" "ped" "age" "type" with
"xyz.npreg" "xyz.glu" "xyz.bp" "xyz.skin" "xyz.bmi" "xyz.ped" "xyz.age" "xyz.type"

How can I make this (automatically). I don't want to make manual with more 100 variables.
I would be very happy if anyone could help me. Thank you for your time.
Kindly regards, Muhammad Subianto



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