a simple solution is:
vec.strings <- c("ab|c|d", "a|b|c", "a", "|a|b|c|d")
f <- function(pat, vec.strings) sapply(strsplit(vec.strings, pat, fixed=TRUE), length)-1
f("|", vec.strings)
but probably there are better proposals.
Best, Dimitris
---- Dimitris Rizopoulos Ph.D. Student Biostatistical Centre School of Public Health Catholic University of Leuven
Address: Kapucijnenvoer 35, Leuven, Belgium Tel: +32/16/336899 Fax: +32/16/337015 Web: http://www.med.kuleuven.ac.be/biostat/ http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm
----- Original Message ----- From: "Marc Mamin" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, February 21, 2005 12:35 PM
Subject: [R] character occurence within a string
Hello,
I'm looking for a function that counts the occurences of a given character within a string.
f('|','ab|c|d') => 2
More precisely, I need to complete a vector of strings to ensure that all elements have the same count of a "separator":
a|b|c a |a|b|c|d
=>
a|b|c|| a|||| |a|b|c|d
I guess that scan makes use of an internal function that would do the job...
Thanks,
Marc Mamin
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