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Shell Programming and Scripting
Script to find the average of a given column and also for specified number of rows??
Post 302282852 by navojit dutta on Monday 2nd of February 2009 03:49:03 AM
02-02-2009
Hi Reddy,
Johnson's script absolutely fine :
for filename in *
do
printf "Average for %s = " "$filename"
awk '/^MAS/ || /^Delhi/ { ++n; sum += $3 }
END { print sum / n }
' "$filename"
done
For the change in your file content just change the line :
awk '/^MAS/ || /^Delhi/ { ++n; sum += $3 }with
awk '/^MAS/ || /^Delhi/ { ++n; sum += $6 } #as u need average of column 6....So that part of the code is dealing with the column number....as u should understand from the Average formula.....
Johnson's script absolutely fine :
for filename in *
do
printf "Average for %s = " "$filename"
awk '/^MAS/ || /^Delhi/ { ++n; sum += $3 }
END { print sum / n }
' "$filename"
done
For the change in your file content just change the line :
awk '/^MAS/ || /^Delhi/ { ++n; sum += $3 }with
awk '/^MAS/ || /^Delhi/ { ++n; sum += $6 } #as u need average of column 6....So that part of the code is dealing with the column number....as u should understand from the Average formula.....
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LEARN ABOUT LINUX
sum
SUM(1) User Commands SUM(1) NAME
sum - checksum and count the blocks in a file SYNOPSIS
sum [OPTION]... [FILE]... DESCRIPTION
Print checksum and block counts for each FILE. -r use BSD sum algorithm, use 1K blocks -s, --sysv use System V sum algorithm, use 512 bytes blocks --help display this help and exit --version output version information and exit With no FILE, or when FILE is -, read standard input. AUTHOR
Written by Kayvan Aghaiepour and David MacKenzie. REPORTING BUGS
Report sum bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> Report sum translation bugs to <http://translationproject.org/team/> COPYRIGHT
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The full documentation for sum is maintained as a Texinfo manual. If the info and sum programs are properly installed at your site, the command info coreutils 'sum invocation' should give you access to the complete manual. GNU coreutils 8.5 February 2011 SUM(1)