Awk scripts for total/average/max/min. All numbers come in on STDIN

avg.awk

#!/usr/bin/awk -f
BEGIN	{ TOTAL=0 }
	{ TOTAL = TOTAL + $1 }
END	{ print TOTAL/NR }

https://stackoverflow.com/questions/19149731/use-awk-to-find-average-of-a-column

krl.awk

cat awk_minmax2.awk
# usage: ls -l | awk -f awk_minmax2.awk
# check this for min https://gist.github.com/jamerfort/4164638

{
sum+=$5
if (NR==1) {
  min=$5
  max=$5
  min_name=$9
  max_name=$9
}

if ($5 > max) {
  max=$5
  max_name=$9
}

#if ($5 < min) {
#  min=$5
#  min_name=$9
#}

if( min == "" || $5 < min ) 
{ min=$5 }

}

END{ 
print "sum:",sum,"max:",max,"min:",min,"avg:",sum/NR
}

max.awk

#!/usr/bin/awk -f
	{ if( MAX == "" || $1 > MAX ) { MAX=$1 } }
END	{ print MAX }

min.awk

#!/usr/bin/awk -f
	{ if( MIN == "" || $1 < MIN ) { MIN=$1 } }
END	{ print MIN }

total.awk

#!/usr/bin/awk -f
BEGIN	{ TOTAL=0 }
	{ TOTAL = TOTAL + $1 }
END	{ print TOTAL }