R help - Feb 2008 - convertin a data frame column from character to numeric

I have a data.frame with all character columns, I would like to convert the last
two columns into numeric.> x[1:5, ]   chrN    start      end                 
1  chr1 71310034 71310064     2 chr14 23354088 23354118     3 chr14 71310034
71310064 4 chr15 37759058 37759088
5 chr22 18262638 18262668 > apply(x, 2, FUN =  mode)    chrN       start     
end        "character" "character" "character"



     
____________________________________________________________________________________
Be a better friend, newshound, and 


	[[alternative HTML version deleted]]

Try this:

x <- cbind(x[1],sapply(x[,2:3], as.numeric))

On 08/02/2008, joseph <jdsandjd at yahoo.com>
wrote:
> I have a data.frame with all character columns, I would like to convert the
last two columns into numeric.> x[1:5, ]   chrN    start      end            
1  chr1 71310034 71310064     2 chr14 23354088 23354118     3 chr14 71310034
71310064 4 chr15 37759058 37759088
> 5 chr22 18262638 18262668 > apply(x, 2, FUN =  mode)    chrN       start
end        "character" "character" "character"
>
>
>
>      
____________________________________________________________________________________
> Be a better friend, newshound, and
>
>
>         [[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