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Full Discussion: Duplicate line removal matching some columns only
Top Forums Shell Programming and Scripting Duplicate line removal matching some columns only Post 302783023 by Michael Stora on Tuesday 19th of March 2013 08:26:04 PM
Old 03-19-2013
Quote:
Originally Posted by RudiC
Untested, just dreamed up:
Code:
awk -F, '{$30=length ($30$31) FS $30}1' file | sort -u | awk '{$30 = ""; $0=$0; $1=$1}1'

Mangles the data, looses the delimiters, header row at bottom.

Mike

---------- Post updated at 05:14 PM ---------- Previous update was at 05:13 PM ----------

Quote:
Originally Posted by rdrtx1
try:
Code:
awk '
NR==1 { a[cnt++]=$0 }
NR>1 {
   s=""; for (i=30; i<=NF; i++) s=s","$i;
   t=$0; NF=29;
   if (! b[$0]) {
      a[cnt++]=t; b[$0]=$0; d[$0]=s;
   } else {
      if (length(s) < length(d[$0])) {a[cnt-1]=t; d[$0]=s;};
   }
}
END {for (i=0; i<cnt; i++) print a[i]}' FS="," OFS="," infile

The output file is identical to the input file (number of rows and row order).

Mike

---------- Post updated at 05:26 PM ---------- Previous update was at 05:14 PM ----------

Quote:
Originally Posted by shamrock
Post a sample of the input and output wanted...
Code:
Input:
header 1,header2,header3,header4,...,header29,header30,header31
vvv,www,xxx,yyy,...,zzz,longer,"really, darn, long, entry"
vvv,www,xxx,yyy,...,zzz,short,"not,so,long"
123,yyy,zzz,aaa,...,bbb,short ,"really, darn, long, entry"
123,yyy,zzz,aaa,...,bbb,longer ,"really, darn, long, entry"
123,yyy,456,aaa,...,bbb,short,"really, darn, long, entry"

Output: (sorting would be nice but not required unless the implementation requires it)
header 1,header2,header3,header4,...,header29,header30,header31
vvv,www,xxx,yyy,...,zzz,short,"not,so,long"
123,yyy,zzz,aaa,...,bbb,short ,"really, darn, long, entry"
123,yyy,456,aaa,...,bbb,short,"really, darn, long, entry"

When the partial rows in bold are not unique keep the one where the total length of the last two columns concatenated is shortest.

Last edited by Michael Stora; 03-19-2013 at 09:33 PM..
 

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