Shell script, awk subtracts the value of each line of data in file a from the corresponding row of file B and obtains its absolute values.

Thinking of solving problems

The file Shu is the following.
220 34 50 70
553 556 32 21
1 1 14) 98 33

The file Jian is the following.
10
8
2

Want to get the result is the following.
210 24 40 60
545 548 24 13
1 1 12) 96 31

Use awk to get the results you want.

[Email protected] study]# awk ' nr==fnr{a[nr]=$1;next}nr!=fnr{for (i=1;i<=nf;i++) {$i >a[fnr]? $i = $i-a[fnr]: $i =a [fnr]-$i}}1 ' Jian Shu
210 24 40 60
545 548 24 13
1 1 12) 96 31

Analyze the steps above

NR==FNR handles the first file next to the Skip function.
A[nr]=$1
a[1]=10
A[2]=8
a[3]=2

NR!=FNR Processing a second file
for (i=1;i<=nf;i++) traversal output 1,2,3,4
$i >a[fnr]? $i = $i-a[fnr]: $i =a[fnr]-$i This is equivalent to three mesh operations such as 3>1?a=1:a=2 this represents when 3 is greater than 1 o'clock, output 1, otherwise output 2

The second file processes the first line first
$1>a[1]?$1=$1-a[1]:$1=a[1]-$1----> 220 greater than 10, so perform 220-10=210
$2>a[1]?$2=$2-a[1]:$2=a[1]-$2----> 34 greater than 10, so perform 34-10=24
$3>A[1]?$3=$3-A[1]:$3=A[1]-$3----> 50 greater than 10, so perform 50-10=40
$4>a[1]?$4=$4-a[1]:$4=a[1]-$4----> 70 greater than 10, so perform 70-10=60

And then, in the second line of work
$1>a[2]?$1=$1-a[2]:$1=a[2]-$1----> 545 greater than 8, so perform 553-8=545
$2>a[2]?$2=$2-a[2]:$2=a[2]-$2----> 556 greater than 8, so perform 556-8=548
$3>A[2]?$3=$3-A[2]:$3=A[2]-$3----> 32 greater than 8, so perform 32-8=24
$4>a[2]?$4=$4-a[2]:$4=a[2]-$4----> 21 greater than 8, so perform 21-8=13

Last process third row
$1>a[3]?$1=$1-a[3]:$1=a[3]-$1----> 1 less than 2, so perform 2-1=1
$2>a[3]?$2=$2-a[3]:$2=a[3]-$2----> 1 less than 2, so perform 2-1=1
$3>a[3]?$3=$3-a[3]:$3=a[3]-$3----> 14 greater than 2, so perform 14-2=12
$4>A[3]?$4=$4-A[3]:$4=A[3]-$4----> 98 greater than 2, so perform 98-2=96
$4>a[3]?$4=$4-a[3]:$4=a[3]-$4----> 33 greater than 2, so perform 33-2=31

So it's output.
210 24 40 60
545 548 24 13
1 1 12) 96 31

The

Shell script, awk, subtracts the value of each line of data in file a from the corresponding row of file B, resulting in absolute values.