Re: [R] Problem reading from a data frame

From: jim holtman <jholtman_at_gmail.com>
Date: Wed, 02 Jul 2008 11:51:32 -0400

Seems to work fine for me:

> x <- c("MT2342", "MT0982", "MT2874")
> gsub("[^0-9]", "", x)
[1] "2342" "0982" "2874"
>

You might have 'factors' so you should use as.character to convert to character strings:

gsub('[^0-9]','',as.character(PthwyGenes))

On Wed, Jul 2, 2008 at 10:24 AM, <naw3_at_duke.edu> wrote:
> Hi,
>
> I have a data frame with strings that have two letters and four numbers. When I
> store a whole row as a new vector and try to remove the preceding letters using
> the gsub command, it returns characters of single numbers that have no relation
> to the numbers in each string. I also noticed that when I view the new vector
> before using gsub, it includes the original headers from the data frame. For
> example,
>
> The original row will contain (i'm not showing the headers):
>
> MT2342 MT0982 MT2874
>
> and after I use the command, 'gsub('[^0-9]','',PthwyGenes),' I get:
>
> "6" "6" "8"
>
> and this result no longer has any headers.
>
> Does anyone know why this happens and how I can fix it?
>
> Thanks,
> -Nina
>
> ______________________________________________
> 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.
>

-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?

______________________________________________
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.
Received on Wed 02 Jul 2008 - 16:25:29 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Wed 02 Jul 2008 - 17:31:48 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive