Copy last few lines of a file, perform math operation and iterate further Post: 303031206

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Top Forums UNIX for Beginners Questions & Answers Copy last few lines of a file, perform math operation and iterate further Post 303031206 by RudiC on Saturday 23rd of February 2019 04:55:42 PM

02-23-2019

Registered User

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Code:

awk '
T[NR]=$0

END     {for (k=1; k<=REP; k++) {++INC
                                 print "----"
                                 for (j=1; j<=NR; j++)  {$0 = T[j]
                                                         for (i=2; i<=NF; i++) $i+=INC
                                                         print
                                                        }
                                }
        }
' REP=3 file
4 0 1 642 643
4 642 643 1283 1284
4 1283 1284 1924 1925
4 1924 1925 2565 2566
4 2565 2566 3206 3207
4 3206 3207 3847 3848
4 3847 3848 4488 4489
4 4488 4489 5129 5130
----
4 1 2 643 644
4 643 644 1284 1285
4 1284 1285 1925 1926
4 1925 1926 2566 2567
4 2566 2567 3207 3208
4 3207 3208 3848 3849
4 3848 3849 4489 4490
4 4489 4490 5130 5131
----
4 2 3 644 645
4 644 645 1285 1286
4 1285 1286 1926 1927
4 1926 1927 2567 2568
4 2567 2568 3208 3209
4 3208 3209 3849 3850
4 3849 3850 4490 4491
4 4490 4491 5131 5132
----
4 3 4 645 646
4 645 646 1286 1287
4 1286 1287 1927 1928
4 1927 1928 2568 2569
4 2568 2569 3209 3210
4 3209 3210 3850 3851
4 3850 3851 4491 4492
4 4491 4492 5132 5133

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igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)