[R] help with gsub and grep functions

[Gabor Grothendieck]

If you split the strings using strsplit:

s <- strsplit(Names," *[()]")  # remove space * if trailing space OK

Then the two results are:

sapply(s,"[",-2)
sapply(s,"[",2)


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Date: Mon, 13 Oct 2003 16:30:37 +0200 
From: Martin Olivier <martinol at ensam.inra.fr>
Subject: [R] help with gsub and grep functions 
 
Hi all,

Let Names a vector of chatacters. For example,

> Names
[1] "g 604 be-0 -p1 (602 matches)" "g 606 Phli-0 -p2 (517 matches)"
[3] "g 608 alu-0 (659 matches)"

I try to use gsub or grep functions for two problems :

1. First, I would like to delete all the characters between parentheses.
[1] "g 604 be-0 -p1" "g 606 be-0 -p2"
[3] "g 608 be-0 -p3"

2. And, I would like to extract the characters between parentheses
[1] "602 matches" "517 matches"
[3] "659 matches"

Any idea?

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