[R] R: help with regexp mass substitution

Mmm, just Friday ... :) Thank you jim gabor -Messaggio originale- Da: jim holtman [mailto:jholt...@gmail.com] Inviato: venerdì 2 ottobre 2009 14.12 A: Luca Braglia Cc: r-help@r-project.org Oggetto: Re: [R] help with regexp mass substitution You need perl=TRUE

[R] help with regexp mass substitution

Hello * i have to rename a lot of variables, and, given that they have regular name constructs, I would like to use regexps. Here's a dump of my head(names(df)) varnames - c(id.quest, txt.1.3, col1.1.3, col2.1.3, col3.1.3, col4.1.3, col5.1.3, txt.2.3, col1.2.3, col2.2.3, col3.2.3, col4.2.3,

Re: [R] help with regexp mass substitution

You need perl=TRUE: gsub(^col(\\d{1,2}).(\\d{1,2}).(\\d{1,2}), dom\\3.rig\\2.col\\1, varnames, perl=TRUE) [1] id.questtxt.1.3 dom3.rig1.col1 dom3.rig1.col2 dom3.rig1.col3 dom3.rig1.col4 dom3.rig1.col5 [8] txt.2.3 dom3.rig2.col1 dom3.rig2.col2 dom3.rig2.col3

Re: [R] help with regexp mass substitution

dot (.) matches anything so be sure to escape it so that it only matches a literal dot in your regular expression. On Fri, Oct 2, 2009 at 5:39 AM, Luca Braglia brag...@poleis.eu wrote: Hello * i have to rename a lot of variables, and, given that they have regular name constructs, I would