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Full Discussion: Average of elements throught multiple files
Top Forums Shell Programming and Scripting Average of elements throught multiple files Post 302222732 by jim mcnamara on Thursday 7th of August 2008 12:38:48 PM
Old 08-07-2008
Great. I got it. Try something like this.
Assume your files have the same base name with numbers after them 1 - 100 or so and the files are called filename1... filename<nnn>
Code:
#!/bin/ksh

> outputfile
filecount=0
for file in filename*
do
	sed -n '380000, $p' $file >> outputfile
	filecount=$(( filecount + 1))
done
awk -v filecount=$filecount '
            BEGIN { i=1}
            { avg[ i % 670000]+=$1 }
     	END{for (i=1; i<= 670000; i++) { printf("%.3f\n", avg[i]/filecount) }) ' outputfile > avgfile

The %.3f format specifier controls the precision of the output, this rounds to 1000ths
 

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