[R] substring if value starts with a character

[arun]

Hi,
Try:
 dat <- read.table(text="A
1  R5000
2  R4800
3  R4700
4  3500
5  3800",sep="",header=TRUE,stringsAsFactors=FALSE)
 dat$A <- as.numeric(gsub("[[:alpha:]]+","",dat$A))
A.K.



On Monday, May 19, 2014 9:02 AM, Mat <matthias.weber at fnt.de> wrote:
Hello togehter, 

i have a litte problem to convert a data.frame. My data.frame looks like
this one
      A
1  R5000
2  R4800
3  R4700
4  3500
5  3800

I need now a command, which outputs all the numbers, without the character
in front.
The solution look like this one:
    
     A
1  5000
2  4800
3  4700
4  3500
5  3800

Thanks.

Best regards. Mat



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