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Serching for pattern down one column


From: ingvar
Subject: Serching for pattern down one column
Date: Mon, 24 Nov 2008 16:59:30 -0800 (PST)

I have a file with binary numbers in colums. Is there any way in emacs to
search for a specific pattern in a column? For example I have the file with
the following:

1  0  0  1
1  1  0  0
0  1  1  1
1  1  1  1
0  0  1  0
0  0  0  0

I now want to search for the pattern "111" in a column (it should find the
pattern in column 2 rows 2-4 and column 3 rows 3-5). Does anyone know how to
do it?

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