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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

bup-margin

bup-margin(1)						      General Commands Manual						     bup-margin(1)

NAME

       bup-margin - figure out your deduplication safety margin

SYNOPSIS

       bup margin [options...]

DESCRIPTION

       bup margin  iterates  through  all  objects  in	your  bup repository, calculating the largest number of prefix bits shared between any two
       entries.  This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.

       For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45.  That  means  a  46-bit
       hash  would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
       its first 46 bits.

       The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects.  Since SHA-1 hashes have 160 bits,
       that  leaves 115 bits of margin.  Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
       with far fewer objects.

       If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see	if
       you're getting dangerously close to 160 bits.

OPTIONS

       --predict
	      Guess  the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
	      from the guess.  This is potentially useful for tuning an interpolation search algorithm.

       --ignore-midx
	      don't use .midx files, use only .idx files.  This is only really useful when used with --predict.

EXAMPLE

	      $ bup margin
	      Reading indexes: 100.00% (1612581/1612581), done.
	      40
	      40 matching prefix bits
	      1.94 bits per doubling
	      120 bits (61.86 doublings) remaining
	      4.19338e+18 times larger is possible

	      Everyone on earth could have 625878182 data sets
	      like yours, all in one repository, and we would
	      expect 1 object collision.

	      $ bup margin --predict
	      PackIdxList: using 1 index.
	      Reading indexes: 100.00% (1612581/1612581), done.
	      915 of 1612581 (0.057%)

SEE ALSO

       bup-midx(1), bup-save(1)

BUP

       Part of the bup(1) suite.

AUTHORS

       Avery Pennarun <apenwarr@gmail.com>.

Bup unknown-															     bup-margin(1)
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