[R] question about a small "for" loop

[Christopher W. Ryan]

Thank you to all for your ideas.  They all solved my problem nicely.
And I learned about paste() too!

--Chris
Christopher W. Ryan, MD
SUNY Upstate Medical University Clinical Campus at Binghamton
40 Arch Street, Johnson City, NY  13790
cryanatbinghamtondotedu
PGP public keys available at http://home.stny.rr.com/ryancw/

"If you want to build a ship, don't drum up the men to gather wood,
divide the work and give orders. Instead, teach them to yearn for the
vast and endless sea."  [Antoine de St. Exupery]

milton ruser wrote:
> May be this helps:
>  
> 
> jaw<-data.frame(vara=1:20,age=runif(20))
> 
> for (i in 2:6)  {
>  jaw[paste("agepow",i, sep="")] <- jaw["age"]^i
>  }
> 
> jaw<-round(jaw,2) # It is just to help the check task
> 
>  
> 
> Cheers,
> 
>  
> 
> Miltinho Astronauta
> 
> Brazil
> 
> 
>  
> 
> 
> 
>  
> On 7/14/08, *Christopher W. Ryan* <cryan at binghamton.edu
> <mailto:cryan at binghamton.edu>> wrote:
> 
>     R 2.5.1 on WinXP
> 
>     I'm trying to create new variables in a dataframe called jaw, as powers
>     of jaw$age up to the sixth power, and name them
> 
>     jaw$age.(--the digit corresponding to the power--)
> 
>     Obviously none of these work (silly for me to try, I suppose):
> 
>     for (i in 2:6) {
>     jaw$age.'i' <- jaw$age^i
>     }
> 
>     for (i in 2:6) {
>     jaw$age.i <- jaw$age^i
>     }
> 
>     for (i in 2:6) {
>     jaw$age."i" <- jaw$age^i
>     }
> 
>     What is the proper syntax to create and name these variables all at
>     once?
> 
>     Thanks.
> 
>     --Chris
>     --
>     Christopher W. Ryan, MD
>     SUNY Upstate Medical University Clinical Campus at Binghamton
>     40 Arch Street, Johnson City, NY  13790
>     cryanatbinghamtondotedu
>     PGP public keys available at http://home.stny.rr.com/ryancw/
> 
>     "If you want to build a ship, don't drum up the men to gather wood,
>     divide the work and give orders. Instead, teach them to yearn for the
>     vast and endless sea."  [Antoine de St. Exupery]
> 
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