[R] regular expression strikes again

[arun]

Hi,
May be this helps:

  gsub(".*\\w+\\s+(.*)\\s+.*","\\1",test)
 #[1] "9,36"  "9,36"  "9,66"  "9,66"  "9,66"  "10,04" "10,04" "10,04" "6,13" 
#[10] "6,13"  "6,13" 

A.K.

----- Original Message -----
From: PIKAL Petr <petr.pikal at precheza.cz>
To: r-help <r-help at r-project.org>
Cc: 
Sent: Tuesday, July 9, 2013 5:45 AM
Subject: [R] regular expression strikes again

Dear experts in regexpr.

I have this

dput(test[500:510])
c("pH 9,36 2", "pH 9,36 3", "pH 9,66 1", "pH 9,66 2", "pH 9,66 3", 
"pH 10,04 1", "pH 10,04 2", "pH 10,04 3", "RGLP 144006 pH 6,13 1", 
"RGLP 144006 pH 6,13 2", "RGLP 144006 pH 6,13 3")

and I want something like this

gsub("^.*([[:digit:]],[[:digit:]]*).*$", "\\1", test[500:510])
[1] "9,36" "9,36" "9,66" "9,66" "9,66" "0,04" "0,04" "0,04" "6,13" "6,13"
[11] "6,13"

but with 10,04 values instead of 0,04.

I tried
gsub("^.*([[:digit:]]+,[[:digit:]]*).*$", "\\1", test[500:510])

or other variations but without any success.

Please help.

Regards
Petr

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