Create the space only in the Third column by awk Post: 303042167

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Top Forums UNIX for Beginners Questions & Answers Create the space only in the Third column by awk Post 303042167 by RudiC on Tuesday 17th of December 2019 06:49:14 AM

12-17-2019

Registered User

You present a difficult data structure that cannot be handled with the usual, generic,"normal" awk methods, like fields, field separators, data elements in one line. You have vertical "pin numbers" in varying fields, positional pointers into to a beforementioned line, no indicator where data begin in a line. That makes a somewhat non-standard approach necessary, relying on unconfirmed, unverified assumptions.

Code:

awk '
NR == 1         {L = index ($0, "r") - 1        # on the first line, calculate where the (all space) lead-in part ends (and 
                }                               # the (non-space) data begin)
                {T = substr ($0, L)             # save the "data part" of each line in a temp variable
                 gsub (/./, "& ", T)            # add a space to every single char in the temp var
                 print substr ($0, 1, L), T     # print the first, unmodified part of the line (= $1 and $2),
                }                               # then the "spaced" data part in temp var
' file

Last edited by RudiC; 12-17-2019 at 10:05 AM..

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LEARN ABOUT BSD

join

JOIN(1) 						      General Commands Manual							   JOIN(1)

NAME

       join - relational database operator

SYNOPSIS

       join [ options ] file1 file2

DESCRIPTION

       Join  forms,  on the standard output, a join of the two relations specified by the lines of file1 and file2.  If file1 is `-', the standard
       input is used.

       File1 and file2 must be sorted in increasing ASCII collating sequence on the fields on which they are to be joined, normally the  first	in
       each line.

       There  is  one line in the output for each pair of lines in file1 and file2 that have identical join fields.  The output line normally con-
       sists of the common field, then the rest of the line from file1, then the rest of the line from file2.

       Fields are normally separated by blank, tab or newline.	In this case, multiple separators count as one, and leading  separators  are  dis-
       carded.

       These options are recognized:

       -an    In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2.

       -e s   Replace empty output fields by string s.

       -jn m  Join on the mth field of file n.	If n is missing, use the mth field in each file.

       -o list
	      Each output line comprises the fields specified in list, each element of which has the form n.m, where n is a file number and m is a
	      field number.

       -tc    Use character c as a separator (tab character).  Every appearance of c in a line is significant.

SEE ALSO

       sort(1), comm(1), awk(1)

BUGS

       With default field separation, the collating sequence is that of sort -b; with -t, the sequence is that of a plain sort.

       The conventions of join, sort, comm, uniq, look and awk(1) are wildly incongruous.

7th Edition							  April 29, 1985							   JOIN(1)