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Top Forums Shell Programming and Scripting Bash to calculate average of all files in directory and output by part of filename Post 302982913 by cmccabe on Tuesday 4th of October 2016 04:53:58 PM
Old 10-04-2016
Bash to calculate average of all files in directory and output by part of filename

I am trying to use awk to calculate the average of all lines in $2 for every file in a directory. The below bash seems to do that, but I cannot figure out how to capture the string before the _ as the output file name and have it be tab-delimeted. Thank you Smilie.


Filenames in /home/cmccabe/Desktop/20x/idp
Code:
NA00449_base_counts_allidp.bed_IDP20x.txt
NA02782_base_counts_allidp.bed_IDP20x.txt

Bash
Code:
for f in /home/cmccabe/Desktop/20x/idp/*.txt ; do
     bname=$(basename $f)
     pref=${bname%%.txt}
     awk '{ sum += $2 } END { if (NR > 0) print sum / NR }' $f /home/cmccabe/Desktop/NGS/bed/bedtools/IDP_total_target_length_by_panel/IDP_unix_trim_total_target_length.bed > /home/cmccabe/Desktop/20x/idp/${pref}_average.txt
done

The data files are too large to attach but basically the average is being calculated currently, as below:

current output
Code:
NA00449_base_counts_allidp.bed_IDP_average.txt 98.5648

desired output (same data in it, just only the filename is different)
Code:
NA00449_average.txt     98.5648

 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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