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
See ?paste.
Something like below if you have 100 column names:
dimnames(pima.tr)[[2]] <-
paste(rep('xyz',100),dimnames(pima.tr)[[2]],sep=".")
You probably want to test the paste statement before setting the
dimnames, or operate on a copy of the data until you get the hang of
using paste.
Sean
On Jun 2, 2005, at 7:04 AM, Muhammad Subianto wrote:
> 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
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html
On 6/2/05, Muhammad Subianto <subianto at gmail.com> wrote:> 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.Try this: names(prima) <- paste("xyz", names(prima), sep = ".")
Dear all R-helpers,
Thanks you very much for your help. I would like to thanks Sean Davis
and Gabor Grothendieck for their help.
Best wishes, Muhammad Subianto
On this day 6/2/2005 3:21 PM, Gabor Grothendieck wrote:
>
> Try this:
>
> names(prima) <- paste("xyz", names(prima), sep =
".")
>
On this day 6/2/2005 1:20 PM, Sean Davis wrote:
> See ?paste.
>
> Something like below if you have 100 column names:
>
> dimnames(pima.tr)[[2]] <-
> paste(rep('xyz',100),dimnames(pima.tr)[[2]],sep=".")
>
> You probably want to test the paste statement before setting the
> dimnames, or operate on a copy of the data until you get the hang of
> using paste.
>
> Sean
On this day 6/2/2005 1:04 PM, Muhammad Subianto wrote:> 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
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html
>