Perhaps you could clarify what the general rule is but assuming
that what you want is any word after a colon it can be done with
strapply in the gsubfn package like this:
Lines <- c("Year Built: 1873 Gross Building Area: 578 sq ft",
"Total Rooms: 6 Living Area: 578 sq ft")
library(gsubfn)
strapply(Lines, ": *(\\w+)", backref = -1)
# or if each line has same number of returned words
strapply(Lines, ": *(\\w+)", backref = -1, simplify = rbind)
This matches a colon (:) followed by zero or more spaces ( *)
followed by a word ((\\w+)) and backref= - 1 causes it to return
only the first backreference (i..e. the portion within parentheses)
but not the match itself.
On 9/25/07, lucy b <[EMAIL PROTECTED]> wrote:
> Dear List,
>
> I have an ascii text file with data I'd like to extract. Example:
>
> Year Built: 1873 Gross Building Area: 578 sq ft
> Total Rooms: 6 Living Area: 578 sq ft
>
> There is a lot of data I'd like to ignore in each record, so I'm
> hoping there is a way to use strings as delimiters to get the data I
> want (e.g. tell R to take data between "Built:" and "Gross" -
> incidentally, not always numeric). I think an ugly way would be to
> start at the end of each record and use a substitution expression to
> chip away at it, but I'm afraid it will take forever to run. Is there
> a way to use strings as delimiters in an expression?
>
> Thanks in advance for ideas.
>
> LB
>
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