[R] Replace only Capital Letters

[Prof Brian Ripley]

Another solution (that is correct in other locales than C, since I see 
you are not in an English locale).

gsub(pattern = " ([[:upper:]])", replacement = " {\\1}", x=exampledata)

I think this _is_ the problem, as in your locale (and in en_GB) the sort 
order is probably something like

aAbB...zZ

Or just try the C locale.

On Thu, 22 Jul 2004, Prof Brian Ripley wrote:

> This appears to be a bug.  Please try
> 
> gsub(pattern = " ([A-Z])", replacement = " {\\1}", x=exampledata, perl=TRUE)
> 
> 
> 
> On Thu, 22 Jul 2004, Rau, Roland wrote:
> 
> > Dear All,
> > 
> > I have these data:
> > 
> > exampledata <- c("This is one item", "This is Another One", "And so is
> > This")
> > 
> > I would like to find each occurence of a blank space followed by a Capital
> > Letter and replace it by a blank space, a left curly brace, the respective
> > Capital Letter, and then a right curly brace.
> > 
> > I thought the following will do:
> > gsub(pattern = " ([A-Z])", replacement = " {\\1}", x=exampledata,
> > ignore.case=FALSE)
> > 
> > Unfortunately, the actual output was:
> > "This {i}s {o}ne {i}tem"    "This {i}s {A}nother {O}ne" "And {s}o {i}s
> > {T}his"  
> > 
> > But what I wanted was actually:
> > "This is one item"    "This is {A}nother {O}ne" "And so is {T}his"  
> > 
> > Can anyone tell me what I should change. Should be fairly easy for people
> > with more experience than me using regular expressions, I guess.
> > 
> > Thanks,
> > Roland
> > 
> > P.S. The background is my bibliography-file for BibTeX. If the title field
> > has some content like "An analysis of Denmark", it would actually turn out
> > to be "An analysis of denmark" in my dvi-document. Of course, R is not the
> > appropriate tool for this. But apart from the little problem outlined above,
> > I had a function doing what I wanted in less than 10 minutes.
> > 
> > 
> > +++++
> > This mail has been sent through the MPI for Demographic Rese...{{dropped}}
> > 
> > ______________________________________________
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> > 
> > 
> 
> 

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595