R help - Apr 2008 - using a variable in a subset of a dataframe

Dear R community,    I am using a dataset and would like to define new
variables using a R variable:

e.g.

for (i in 1:10){
   dataset$i<-something
}

But this is not the right way, I get only one variable in "dataset"...
How can I change this?

Thank you!
Georg.
************************
Georg Ehret
Johns Hopkins
Baltimore, MD

	[[alternative HTML version deleted]]

You can try this:

x <- data.frame()
for(i in LETTERS[1:5]) x[1:10, i] <- rnorm(10)
x


On 01/04/2008, Georg Ehret <georgehret at gmail.com>
wrote:
> Dear R community,    I am using a dataset and would like to define new
>  variables using a R variable:
>
>  e.g.
>
>  for (i in 1:10){
>    dataset$i<-something
>  }
>
>  But this is not the right way, I get only one variable in
"dataset"...
>  How can I change this?
>
>  Thank you!
>  Georg.
>  ************************
>  Georg Ehret
>  Johns Hopkins
>  Baltimore, MD
>
>         [[alternative HTML version deleted]]
>
>  ______________________________________________
>  R-help at r-project.org mailing list
>  https://stat.ethz.ch/mailman/listinfo/r-help
>  PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
>  and provide commented, minimal, self-contained, reproducible code.
>

-- 
Henrique Dallazuanna
Curitiba-Paran?-Brasil
25? 25' 40" S 49? 16' 22" O

i m not sure what u really want to do but if ur looking for some subsample
   of dataset then u might wanna try this (say in case u want to resample ur
   dataset by column "id" in ur dataset then do

   resample<-sample(dataset$id,n,replace=F)

   dataset<-dataset[resample, ]

   note here n is the size of subset u wanna sample from ur dataset

   hope this helps.

   cheers

   tasneem zaihra

   On Tue, 1 Apr 2008 14:23:10 -0400 "Georg Ehret" wrote:
   > Dear R community, I am using a dataset and would like to define new
   > variables using a R variable:
   >
   > e.g.
   >
   > for (i in 1:10){
   > dataset$i<-something
   > }
   >
   > But this is not the right way, I get only one variable in
"dataset"...
   > How can I change this?
   >
   > Thank you!
   > Georg. > ************************
   > Georg Ehret
   > Johns Hopkins
   > Baltimore, MD
   >
   > [[alternative HTML version deleted]]
   >
   > ______________________________________________
   > R-help at r-project.org mailing list
   > https://stat.ethz.ch/mailman/listinfo/r-help
   > PLEASE do read the posting guide
   http://www.R-project.org/posting-guide.html
   > and provide commented, minimal, self-contained, reproducible code.