grep("^b$",nom) will match "b" only.
Alec
Alec Stephenson
Department of Statistics
Macquarie University
NSW 2109, Australia
>>> "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> 07/08/04 05:20pm >>>
Let me present to you my problem :
I have a character vector x and I would like to obtain the indices of
the
elements of
this vector that yielded exactly a match.
For example, x=nom, pattern="b", I would to obtain 2 because "b" is on
the
second position.
First program :
nom <- c("a","b","ab")
grep("b",nom)
2 3
Then I try the option extended =FALSE (instead of TRUE by default) and
I
obtain '2 3' a second time.
Please can you help me : How can I obtain only 2 in using the grep
function
(without using the match function).
Thanks you
Julie AUBERT
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