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Full Discussion: Calculate average from a given set of keys and values
Top Forums UNIX for Beginners Questions & Answers Calculate average from a given set of keys and values Post 303037874 by rdrtx1 on Thursday 15th of August 2019 11:23:23 AM
Old 08-15-2019
The script posted and output don't show any average calculation. Grades range total maybe.
An ex.:
Code:
#!/bin/bash

ARRAY=( "ABC:60"
"DEF:70"
"GHI:75"
"JKL:80" )

declare -a scores=("1000-90" "90-80" "80-70" "70-60" "60-50" "50-0")
declare -a ranges=("over 90" "90-80" "80-70" "70-60" "60-50" "under 50")
declare -A totals

for student in "${ARRAY[@]}" ; do
KEY="${student%%:*}"
VALUE="${student##*:}"
printf "%s's marks is %s.\n" "$KEY" "$VALUE"
c=0;
for i in "${scores[@]}" ; do
if [[ $VALUE -ge ${i##*-} ]] && [[ $VALUE -le ${i%%-*} ]] ; then
(( totals[${ranges[$c]}] = totals[${ranges[$c]}] + 1 ))
fi
(( c = c + 1 ))
done
done

for s in "${ranges[@]}"
do
printf "%-10s %d\n" "$s" ${totals["$s"]}
done

Last edited by rdrtx1; 02-18-2020 at 08:30 PM..
 

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LEARN ABOUT OPENDARWIN

ac

AC(8)							    BSD System Manager's Manual 						     AC(8)

NAME

     ac -- display connect time accounting

SYNOPSIS

     ac [-d] [-p] [-w file] [users ...]

DESCRIPTION

     If the file /var/log/wtmp exists, a record of individual login and logout times are written to it by init(8) and login(8) respectively.  The
     program ac examines these records and writes the accumulated connect time for all logins to the standard output.

     Options available:

     -d      Display the connect times in 24 hour chunks.

     -p      Display individual user totals.

     -w file
	     Read raw connect time data from file instead of the default file /var/log/wtmp.

     users ...
	     Display totals for the given individuals only.

     If no arguments are given, ac displays the total amount of login time for all active accounts on the system.

     The default wtmp file is an infinitely increasing file unless frequently truncated.  This is normally done by the daily daemon scripts sched-
     uled by cron(8) which rename and rotate the wtmp files before truncating them (and keeping about a weeks worth on hand).  No login times are
     collected however, if the file does not exist.

FILES

     /var/log/wtmp
     /var/log/wtmp.[0-7]  rotated files

SEE ALSO

     init(8), sa(8), login(1), utmp(5).

HISTORY

     A ac command appeared in Version 6 AT&T UNIX.

4th Berkeley Distribution					  April 19, 1994					 4th Berkeley Distribution
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