search of common words in set of files Post: 302321240

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Top Forums Shell Programming and Scripting search of common words in set of files Post 302321240 by mala on Sunday 31st of May 2009 09:36:41 AM

05-31-2009

Registered User

search of common words in set of files

Hi,

I have a set of simple, one columned text files (in thousands).
file1:
a
b
c
d
file 2:
b
c
d
e
and so on. There is a collection of words in another file:
b d
b c d e
I have to find out the set of words (in each row) is present or absent in the given set of files. So, the output would be in matrix form (file*set) like:
1 0
1 1
I have the following code in bash, which is working well, but it involves very high computational cost with the increase of the file and set size. Any suggestion for better checking for the words is much appreciated.

My code segment:

Code:

#!/bin/sh
rm -f feat.txt 
touch feat.txt 
rm -f tem.txt
touch tem.txt
#read the rows of set file s.txt and put into seperate files 
lables=1
while read myline
  do
   echo $myline > temp.txt
   cat temp.txt|awk '{for (i=1;i<=NF;i++) print $i}'|sort|uniq > l$lables.txt
   lables=`expr $lables + 1`
  done < s.txt
p=`wc -l s.txt| awk '{print $1}'`
q=`expr $p - 1`
a=1
c=`expr $a + $q`
while [ $a -le $c ]
  do
  rm -f a.txt
  touch a.txt
  fileno=1
  while [ $fileno -le 1000 ]
   do
     cat l$a.txt|fgrep -xvf $fileno.txt| awk '{printf ($1 " ")}' >> a.txt
     echo >>a.txt
     fileno=`expr $fileno + 1`
   done 
  cat a.txt |awk '{if ($0 != NULL) print "0"; if ($0 == null) print "1"}'>c.txt
  paste c.txt feat.txt > feat1.txt
  cat feat1.txt >feat.txt
  a=`expr $a + 1`
 done

Thank you in advance

Last edited by vidyadhar85; 05-31-2009 at 10:45 AM.. Reason: code tag added

mala

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create_text_search_dictionary

CREATE TEXT SEARCH 
DICTIONARY(7)				   SQL Commands 				  CREATE TEXT SEARCH DICTIONARY(7)

NAME

       CREATE TEXT SEARCH DICTIONARY - define a new text search dictionary

SYNOPSIS

       CREATE TEXT SEARCH DICTIONARY name (
	   TEMPLATE = template
	   [, option = value [, ... ]]
       )

DESCRIPTION

       CREATE  TEXT SEARCH DICTIONARY creates a new text search dictionary. A text search dictionary specifies a way of recognizing interesting or
       uninteresting words for searching. A dictionary depends on a text search template, which specifies the functions that actually perform  the
       work. Typically the dictionary provides some options that control the detailed behavior of the template's functions.

       If  a  schema  name  is	given  then  the text search dictionary is created in the specified schema. Otherwise it is created in the current
       schema.

       The user who defines a text search dictionary becomes its owner.

       Refer to in the documentation for further information.

PARAMETERS

       name   The name of the text search dictionary to be created. The name can be schema-qualified.

       template
	      The name of the text search template that will define the basic behavior of this dictionary.

       option The name of a template-specific option to be set for this dictionary.

       value  The value to use for a template-specific option. If the value is not a simple identifier or number, it must be quoted (but  you  can
	      always quote it, if you wish).

       The options can appear in any order.

EXAMPLES

       The following example command creates a Snowball-based dictionary with a nonstandard list of stop words.

       CREATE TEXT SEARCH DICTIONARY my_russian (
	   template = snowball,
	   language = russian,
	   stopwords = myrussian
       );

COMPATIBILITY

       There is no CREATE TEXT SEARCH DICTIONARY statement in the SQL standard.

SEE ALSO

       ALTER TEXT SEARCH DICTIONARY [alter_text_search_dictionary(7)], DROP TEXT SEARCH DICTIONARY [drop_text_search_dictionary(7)]

SQL - Language Statements					    2010-05-14					  CREATE TEXT SEARCH DICTIONARY(7)