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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 302982922 by greet_sed on Tuesday 4th of October 2016 05:55:56 PM
Old 10-04-2016
Hi,

Can you please consider this as a starting point to get what you need?

Code:
A=NA00449_base_counts_allidp.bed_IDP_average.txt
echo ${A%%_*}_${A##*_}

gives output:
Quote:
NA00449_average.txt
or in awk
Code:
echo "NA00449_base_counts_allidp.bed_IDP_average.txt" | awk -F_ '{print $1FS$NF}'


Last edited by greet_sed; 10-04-2016 at 07:03 PM.. Reason: adding awk solution
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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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