[R] Modify string-regular expression

From: Romain <b.romain36_at_voila.fr>
Date: Fri, 30 May 2008 11:25:32 +0200 (CEST)

Hi there everybody,

I would like to be able to modify a string like 'Param_i = Val_i-1' in 'Param_i = Val_i-2' in a text file Indeed I have two arrays :
-One for the name of my parameters
-One for the new values for each parameter

I would like to write a loop like this one :


SCAN <- scan("File.txt",sep="\n", what="raw",blank.lines.skip=F) For (i in 1:Nb_param)

    sub('Param[i] = Value_i-1','Param[i] = Value_i-2', SCAN) }


I Know how to modify a string with sub when it is a fixed string : sub("(K =)([0-9]*)",paste("\\1", Value[i,2]),SCAN) But i would like to know if it is possible to use the function paste or something else in the first argument of the function sub. For example, the correct syntax of :
' sub("(Param[i])([0-9]*)",paste("\\1", Value[i,2]),SCAN) '

If I'm not clear enough please let me know.. Thank you for your help.


Vous aussi bénéficiez d'1 Go de stockage gratuit en ligne avec Voila http://macle.voila.fr

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 Mon 02 Jun 2008 - 05:20:25 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 Mon 02 Jun 2008 - 05:30:36 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