Re: Insert character x at...

On 2013-05-16 11:59, Aurelio Jargas wrote:
> On Thursday, May 16, 2013, Tim Chase wrote:
> > For the original request:
> >
> >   sed '/^0530/s/\(.\{31\}/\1x/' input.txt

Doh, I missed the closing "\)" in there.  Should have been

  sed '/^0530/s/\(.\{31\}\)/\1x/' input.txt

which could have been reduced in this particular case to

  sed '/^0530/s/.\{31\}/&x/' input.txt

> One alternative to insert a char after a column N is to use the
> numeric flag in the s command.
> 
>  $ echo 123456789 | sed 's/./&x/5'
> 12345x6789

But that's pretty slick.  I don't often recall the /{number} flag, as
vi/vim doesn't offer it, so I don't have as much occasion to use it.

-tim