Question

I’m trying to extract fields from a rectangular matrix in a file “input.dat” using awk which is as follows

Name value1 value2 value3
A 0 100 200
B 100 0 200
C 0 0 0
D 50 50 50
E 0 90 90 

to get the output

A.value1=0
A.value2=100
A.value3=200
B.value1=100
.
.
.
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Answer 1

awk 'NR==1 { split( $0, a); next } 
    { for( i=2; i <= NF; i++ )
        print $1 "." a[i] "=" $i
    }' input.dat

Or:

awk 'NR==1 { split( $0, a); next }
    { for( i=2; i <= NF; i++ ) 
        printf "%s.%s=%s\n", $1, a[i], $i
    }' input.dat