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Full Discussion: awk to reorder lines in file
Top Forums Shell Programming and Scripting awk to reorder lines in file Post 302982152 by cmccabe on Sunday 25th of September 2016 12:02:55 PM
Old 09-25-2016
awk to reorder lines in file

The output of an awk script is the below file. Line 1,3 that starts with the Ion... need to be under line 2,4 that starts with R_. The awk runs but no output results. Thank you Smilie.

file
Code:
IonXpress_007 MEV37
R_2016_09_20_12_47_36_user_S5-00580-7-Medexome
IonXpress_007 MEV40
R_2016_09_20_12_47_36_user_S5-00580-8-Medexome

desired output
Code:
R_2016_09_20_12_47_36_user_S5-00580-7-Medexome
IonXpress_007 MEV37
R_2016_09_20_12_47_36_user_S5-00580-8-Medexome
IonXpress_007 MEV40

awk
Code:
awk 'BEGIN{split("R_",n)} {a[NR]=$0} END{for(i=1;i in n;i++) print a[n[i]]}' file

 

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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)
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