UNIX for Dummies Questions & Answers

5
9
7
23
0
5
7
78
0
3
7
0
5
44
9
0

5
9
7
23
23
5
7
78
78
3
7
7
5
44
9
9

#!/bin/bash
# no-zero.sh
> /tmp/zeros
> /tmp/nozeros
number=""
echo "5
9
7
23
0
5
7
78
0
3
7
0
5
44
9
0" > /tmp/zeros
text=$(cat < /tmp/zeros)
echo "$text"
# Start of conversion proper...
while read line
do
	if [ "$line" != "0" ]
	then
		printf "$line\n" >> /tmp/nozeros
	else
		printf "$number\n" >> /tmp/nozeros
	fi
	number="$line"
done < /tmp/zeros
# End of conversion...
echo "Results:-"
cat < /tmp/nozeros

Last login: Sat Apr 12 21:44:35 on ttys000
AMIGA:barrywalker~> chmod 755 zeros.sh
AMIGA:barrywalker~> ./zeros.sh
5
9
7
23
0
5
7
78
0
3
7
0
5
44
9
0
Results:-
5
9
7
23
23
5
7
78
78
3
7
7
5
44
9
9
AMIGA:barrywalker~> _

awk     '               {C= NR   %3
                         B=(NR-1)%3
                         A=(NR-2)%3
                         T[C]=$0}
         !(T[B])        {T[B]=(T[A]+T[C])/2}
         NR>2           {print T[A]}
         END            {print T[B]
                         print T[C]}
        ' file
5
9
7
23
14
5
7
78
40.5
3
7
6
5
44
9
0

paste <(echo; sed '$d' file) file <(tail -n +2 file) | awk -F'\t' '{print ($2 ? $2 : ($1+$3)/2)}'

awk '{a[NR] = $0} END {for(i = 1; i <= NR; i++) {if(a[i] == 0) {a[i] = (a[(i-1)] + a[(i+1)]) / 2}; print a[i]}}' file

awk '{a[NR] = $0} END {for(i = 1; i <= NR; i++) {if(a[i] == 0) {a[i] = (a[(i-1)] + a[(i+1)]) / 2}; printf "%d\n", a[i]}}' file

awk '{a[NR] = $0} END {for(i = 1; i <= NR; i++) {if(a[i] == 0) {a[i] = a[(i-1)]}; print a[i]}}' file

awk 'NR == 1 {p = $0; next} {print p; if($0 != 0) {p = $0}} END {print p}' file

awk 'function pr(){print p?p:(q+$1)/2} NR>1{pr()} {q=p; p=$1} END{pr()}' file

awk '!$1{$1+=p}{p=$1}1' file