Serching for pattern down one column

Serching for pattern down one column

[ingvar]

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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Re: Serching for pattern down one column

[aartist]

On Nov 24, 7:59 pm, ingvar <ing...@nanosi.com> wrote:
> 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?
>
> --
> View this message in context:http://www.nabble.com/Serching-for-pattern-down-one-column-tp20673287...
> Sent from the Emacs - Help mailing list archive at Nabble.com.

Consider converting columns into rows and search via regexp.

Re: Serching for pattern down one column

[Paul R]

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

In this particular case I'd first transpose then use classic row-based
facilities.

-- 
  Paul

Re: Serching for pattern down one column

[Peter Dyballa]

Am 25.11.2008 um 01:59 schrieb ingvar:

> 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?


I think it's *not* possible to write *one* regular expression to find  
the occurrence in *any* column, though it's possible to write n  
regexps to find the occurrence in exactly one of the n columns.

--
Greetings

   Pete

A lot of us are working harder than we want, at things we don't like  
to do. Why? ...In order to afford the sort of existence we don't care  
to live.
				– Bradford Angier

Re: Serching for pattern down one column

[Chris McMahan]

Peter Dyballa <Peter_Dyballa@Web.DE> writes:
> Am 25.11.2008 um 01:59 schrieb ingvar:
>
>> 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?
>
>
> I think it's *not* possible to write *one* regular expression to find
> the occurrence in *any* column, though it's possible to write n
> regexps to find the occurrence in exactly one of the n columns.
>
> --
> Greetings
>
>   Pete
>
> A lot of us are working harder than we want, at things we don't like
> to do. Why? ...In order to afford the sort of existence we don't care
> to live.
> 				– Bradford Angier

How about a simple lisp function that would query the user for the
column (or take it from the current cursor position) and plug that into
a regexp to search?

- chris

-- 
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