Re: [R] Convert character string to number

From: Hans-Jörg Bibiko <bibiko_at_eva.mpg.de>
Date: Sat, 21 Jun 2008 11:44:44 +0200

On 21.06.2008, at 01:36, Ken Liu wrote:
> I would like to convert a character vector
>
> xxx <- c("1/2", "1/4")
>
> to
>
> yyy <- c(0.5, 0.25)
>
>
> , but as.numeric didn't work for me. Could anyone give me a hint
> please?

There are many many ways, and they're depending on the structure of xxx. If you only have such fractions you can use this naïve approach:

as.numeric( gsub("(\\d+)/(\\d+)", "\\1", xxx, perl=T) ) / as.numeric ( gsub("(\\d+)/(\\d+)", "\\2", xxx, perl=T) )

--Hans



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 Sat 21 Jun 2008 - 09:49:26 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 Sat 21 Jun 2008 - 13:30:48 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