Message-ID: <48E0F50E.7030307@biostat.ku.dk>
Date: 2008-09-29T15:32:30Z
From: Peter Dalgaard
Subject: turning comma separated string from multiple choices into flags
In-Reply-To: <6f80c1520809290812w1df0b62fj5bd66f0ff42ad297@mail.gmail.com>
June Kim wrote:
> Thank you. The misspelling of Harvard wasn't intended. The data are
> spelled consistently.
>
OK. One other potential problem: If the strings are substrings of
eachother (as in "Science" and "Statistical Science") then you may need
more care.
And I misremembered: It is probably better to use regexpr(....) != -1
than grep(....) for this purpose because the latter returns indices
rather than a value for each element.
--
O__ ---- Peter Dalgaard ?ster Farimagsgade 5, Entr.B
c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907