[R] Manipulate strings reordering some elements
bhh at xs4all.nl
Tue Mar 13 11:51:49 CET 2012
On 13-03-2012, at 11:28, Igor Sosa Mayor wrote:
> many thanks, Berend.
> It works well... but with a problem because i was not completely clear
> in my first email.
> It works with cases such as:
> Franco (El)
> Regueras (Las)
> but not with other cases such as:
> Fauces de San Andrés (Las)
> any hints? or meaybe if it is very complicated, any short explanation of
> the perl expression you wrote (as far as I can understand, the point is
> this \\3 \\1...).
gsub("([^\\(]+)(\\()(.*)(\\))","\\3 \\1", municipios, perl=TRUE)
([^\\(]+) look for a sequence of characters not (, this becomes the \1
(\\() match (
(.*) match zero or more anything, this becomes \3
(\\)) match closing )
All subexpressions surrounded by () for backreferencing in replacement expression to work.
The result of the above expression will contain trailing blanks if there was a (El) etc.
You can get rid of those by using gsub("\\s+$","",x)
I'm in a bit of a hurry now, so I won't be able to answer further questions for several hours.
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