Shell Programming and Scripting

diff

awk 'NR == FNR { A[$0]=1; next } !A[$0]' reference.txt file1.txt

12.12    87
11.95    88
11.83    89
12.55    84
12.42    85
12.27    86
11.82    89
12.55    84.03
12.38    85.15
12.1    87.03
11.97    88
12.25    86.03
12.07    87.42
11.9    88.35
11.8    89.07

output looks like this
9    72.92         available
9.75    72.77    available
10.57    72.75  available
10.53    73       available
10.43    73.5    available
10.33    74       available
9.97    76         available
11.95    88       not available
11.83    89       not available
12.55    84       not available
12.42    85       not available
12.27    86       not available
11.82    89       not available

awk 'NR==FNR{A[$0]=$0; next}{print A[$0]?A[$0] FS "available" : $0 FS "not available" }' reference.txt file1.txt

$ awk 'NR==FNR {Av[$0]++; next} {print $0 (!Av[$0]?" not":_) " available"}' reference.txt file1.txt

A[$0]=$0

awk 'NR==FNR{A[$2,$5]=$0; next}{print A[$1,$2]?$0 FS "available" : $0 FS "not available" }' reference.txt file1.txt

awk     'NR==FNR {Av[++max]=$0; next}
                 {NT = "not "
                  for (i=1; i<=max; i++) if (Av[i] ~ $0) {NT=""; break}
                  print $0 "\t" NT "available"}
        '  reference.txt file1.txt

print A[$1,$2]?$0 FS "available" : $0 FS "not available"

9            72.92          available 
9.75       72.77     available 
10.57     72.75    available 
10.53     73              available 
10.43     73.5        available
10.33     74             available 
9.97       76                available 
11.95     88              not available 
11.83     89             not available 
12.55    84              unmatched reference file 
12.42     85              unmatched reference file