Shell Programming and Scripting

#!/bin/bash

FILE="$1"

VALUEBEFORE=0

while read line
do

VALUE=`echo $line | awk '{print($2)}'`
NAME=`echo $line | awk '{print($1)}'`

TEST=`echo $VALUE $VALUEBEFORE | awk '{print($1 - $2)}'`

VALUEBEFORE=`echo $line | awk '{print($2)}'`

echo "$NAME   $TEST"

done < $FILE

#!/bin/bash

FILE="$1"

awk 'NR==1{print;next}!val{val=$NF;print ;next}{p=val;val=$NF;$NF= $NF-p}1' $FILE > newfile

awk 'p{print $0-p}{p=$0}' file

#!/bin/bash
OLDVAL=0
while read NAME VALUE
do
   echo "$NAME $((VALUE-OLDVAL))"
   OLDVAL=$VALUE
done <"$1"

awk -v s=0 'NR==1{print;next}{print $1,$2-s;s=$2}' infile

awk  'NR-1{x=y;y=$NF;$NF=$NF-x}1' file