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Date: Mon, 25 Feb 2008 16:11:58 +0700
From: Eugene Grosbein <eugen@kuzbass.ru>
To: Szemer?dy G?bor <gaborszem@eccf.su.ac.yu>
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Cc: freebsd-stable@freebsd.org
Subject: Re: Inserting a character in certain column
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On Mon, Feb 25, 2008 at 09:52:21AM -0800, Szemer?dy G?bor wrote:

> I need to insert a character in certain column in all rows of the file 
> using vi.
> Please help

I don't use vi but remember it can use regexp like sed does:
the following examle inserts X after 5th column (read, in 6 column):

sed -E 's/^(.{5})(.*)/\1X\2/'

Eugene Grosbein