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Full Discussion: Venn diagram results using awk
Top Forums Shell Programming and Scripting Venn diagram results using awk Post 302672581 by jacobs.smith on Monday 16th of July 2012 03:09:46 PM
Old 07-16-2012
Quote:
Originally Posted by Vryali
I've got to step out, so can't actually finish this, but I got the bulk of if basically done, just needs some adaptation and to be thrown in a shell script that takes parameters to be done cleaner.

Code:
for num in $(cat 1.txt|awk '{print $1}'); do grep "^$num" [21].txt | tr -d '\n' | sed 's/\([0-9].txt:\)//g' | sed 's/\([0-9]\)[a-zA-Z]/\1/g'; echo ''; done | sed 's/^[ \t]*//;s/[ \t]*$//;/^$/d' | awk 'int($3) {print $0}'

More organized...
Code:
for num in $(cat 1.txt|awk '{print $1}'); do 
    # grep - Pull lines from relevant files and output them
    # Will be in the format '<filename>:<line>
    # Trim the newline so it's all one one-line for each entry.
    # Use sed to remove the filenames from the line
    # We'll have a <number>a <number2> -  sed removes the letter after the number
    grep "^$num" [21].txt | \
    tr -d '\n' | \
    sed 's/\([0-9].txt:\)//g' | \
    sed 's/\([0-9]\)[a-zA-Z]/\1/g'
    #We removed CRs, add one back to delimit EOL
    echo ' '
done | \
    sed 's/^[ \t]*//;s/[ \t]*$//;/^$/d' | \
    awk 'int($3) {print $0}'
    # Use sed to trim all leading/trailing whitespace and delete empty lines
    # Use awk to only print lines that have a 3rd parameter, IE it was found in both files.

That hard coded in a few files will give you what you'd want, just change "[21].txt" to the proper regex or hardcoded names (and this should support 2 or 3 file comparisons as written, just change hardcoded lines). If that isn't enough to get you going I'll try to check back in later this afternoon for anything else.

Edit: What I see running the above with the same text files you gave:
Code:
$ for num in $(cat 1.txt|awk '{print $1}'); do grep "^$num" [21].txt | tr -d '\n' | sed 's/\([0-9].txt:\)//g' | sed 's/\([0-9]\)[a-zA-Z]/\1/g'; echo ' '; done | sed 's/^[ \t]*//;s/[ \t]*$//;/^$/d' | awk 'int($3) {print $0}'
a 10 21
b 11 22
c 12 23
g 16 24
h 17 25
i 18 26

Vryali,

Thanks for ur time, patience and interest. You proved the core value of this forum.

I will see how this solution is working and will post the outcome too.

Please look into it to make it generate all requested files.

I am a novice in coding as I come from the life sciences shop.

Thanks a ton for all ur support.
 

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LEARN ABOUT DEBIAN

plan9-grep

GREP(1) 						      General Commands Manual							   GREP(1)

NAME

       grep, g - search a file for a pattern

SYNOPSIS

       grep [ option ...  ] pattern [ file ...	]

       g [ option ...  ] pattern [ file ...  ]

DESCRIPTION

       Grep  searches the input files (standard input default) for lines that match the pattern, a regular expression as defined in regexp(7) with
       the addition of a newline character as an alternative (substitute for |) with lowest precedence.  Normally, each line matching the  pattern
       is `selected', and each selected line is copied to the standard output.	The options are

       -c     Print only a count of matching lines.
       -h     Do not print file name tags (headers) with output lines.
       -e     The  following  argument	is taken as a pattern.	This option makes it easy to specify patterns that might confuse argument parsing,
	      such as -n.
       -i     Ignore alphabetic case distinctions.  The implementation folds into lower case all letters in the pattern and input before interpre-
	      tation.  Matched lines are printed in their original form.
       -l     (ell) Print the names of files with selected lines; don't print the lines.
       -L     Print the names of files with no selected lines; the converse of -l.
       -n     Mark each printed line with its line number counted in its file.
       -s     Produce no output, but return status.
       -v     Reverse: print lines that do not match the pattern.
       -f     The pattern argument is the name of a file containing regular expressions one per line.
       -b     Don't buffer the output: write each output line as soon as it is discovered.

       Output  lines  are  tagged  by  file name when there is more than one input file.  (To force this tagging, include /dev/null as a file name
       argument.)

       Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in
       single quotes '...'.  An expression starting with '*' will treat the rest of the expression as literal characters.

       G invokes grep with -n and forces tagging of output lines by file name.	If no files are listed, it searches all files matching

	      *.C *.b *.c *.h *.m *.cc *.java *.cgi *.pl *.py *.tex *.ms

SOURCE

       /src/cmd/grep
       /bin/g

SEE ALSO

       ed(1), awk(1), sed(1), sam(1), regexp(7)

DIAGNOSTICS

       Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs.

																	   GREP(1)
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