On Tue, Nov 2, 2010 at 6:20 AM, RINNER Heinrich
<[email protected]> wrote:
> Hello,
>
> thanks again for this nice solution using sub and regular expressions!
> However, in real life I have to overwrite more than two positions with blanks
> (say 50 or so), so I was trying to modify this in the following way:
>
>> s <- c("ab34cd78e", "fg3 hi78j")
>
> # your suggestion (works perfectly for the simple case):
>> sub("^(..)..(..)..", "\\1 \\2 ", s)
> [1] "ab cd e" "fg hi j"
>
> # gereralizing the pattern (works as well):
>> sub("^(.{2}).{2}(.{2}).{2}", "\\1 \\2 ", s)
> [1] "ab cd e" "fg hi j"
>
> # generalizing the replacement (doesn't work):
>> sub("^(.{2}).{2}(.{2}).{2}", "\\1 {2}\\2 {2}", s)
> [1] "ab {2}cd {2}e" "fg {2}hi {2}j"
>
> Apparently, " {2}" ist not interpreted as a string with two blanks (" ") in
> the replacement part, so something is wrong in my expression there. I just
> can't figure out what...
>
If its always the same pattern repeated over and over then this works:
gsub("(..)..", "\\1 ", s)
--
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