Take file with column of numbers, in every block of 5 filter out ones larger then token

data

1
2
3
4
5
6
7
8
12
31
4
5
6
3
76
34
87
57

gistfile1.txt

#!/bin/bash

# usage: ./thisscript /path/to/file <int>

die () {
	echo $1
	exit $2
}

test -f $1 || die "No such file $1" 1
[[ $2 ]]   || die "Expect number as a second parameter"

# filter_min takes line with numbers on stdin and minimal value as first parameter
# e.g. echo "34 87 57 1 2" | filter_min 5
# output 34 87 57
filter_min() { xargs -n1 | while read line; do [[ $line -gt $1 ]] && echo $line; done; }

# count_min takes line with numbers on stdin and counts number of numbers larger then min
count_min () { xargs -n1 | awk -v min=$1 '{ if ($1 > min) {sum+=1} } END { print sum }'; }

# outputs 0 if stdin is empty, otherwise outputs stdin
zero_if_empty () { a=$(cat -); [[ $a -gt 0 ]] && echo $a || echo 0; }

c=0
for line in $(cat $1); do 
  [[ $c -gt 9 ]] && c=0;                                          # if c > 4 then reset c to 0
  [[ $c == 0 ]] && arr=$line || arr="$arr $line";                 # if c == 0 initialize new array, else append value to array
  c=$(($c + 1));                                                  # increment c
  [[ $c == 10 ]] && echo $arr | count_min $2 | zero_if_empty;     # if c == 10 filter array through function
done

output

5
7