[R] two questions about character manipulation

[arun]

Hi,
Try this:
ex<-"cbind(data$response1,data$response2)" 
 gsub(".*\\(.*\\$(.*)\\,.*\\$.*\\)","\\1",ex)
#[1] "response1"


unlist(strsplit(gsub(".*\\(.*\\$(.*)\\,.*\\$(.*)\\)","\\1 \\2",ex)," "))
#[1] "response1" "response2"
A.K.



----- Original Message -----
From: Özgür Asar <oasar at metu.edu.tr>
To: r-help at r-project.org
Cc: 
Sent: Sunday, September 16, 2012 12:26 PM
Subject: Re: [R] two questions about character manipulation

Dear Rui Barradas and Michael Weylandt,

Many thanks for your replies.

My second question is solved now.

But I think I did not expressed my first wish in a clear way

Indeed, 

in ex<-"cbind(data$response1,data$response2), 

I want to extract the variable name between "$" and "," (corresponds to
response1 in this example) and the one between "$" and ")" (corresponds to
response2).

These symbols ("$", ",", ")" ) are always same, but the names (response1,
response2) might change from data to data.

Best

Ozgur




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