[R] removing characters from a string

[Robin Hankin]

Hi

Try


  gsub("[^0-9]","","1111af-456utaDFasswe34534%^&%*$h567890ersdfg")
[1] "111145634534567890"



HTH

rksh



On Apr 12, 2005, at 01:54 pm, Vivek Rao wrote:

> Is there a simple way in R to remove all characters
> from a string other than those in a specified set? For
> example, I want to keep only the digits 0-9 in a
> string.
>
> In general, I have found the string handling abilities
> of R a bit limited. (Of course it's great for stats in
> general). Is there a good reference on this? Or should
> R programmers dump their output to a text file and use
> something like Perl or Python for sophisticated text
> processing?
>
> I am familiar with the basic functions such as nchar,
> substring, as.integer, print, cat, sprintf etc.
>
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--
Robin Hankin
Uncertainty Analyst
Southampton Oceanography Centre
European Way, Southampton SO14 3ZH, UK
  tel  023-8059-7743