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Full Discussion: Shell script to Split matrix file with delimiter into multiple files
Top Forums UNIX for Beginners Questions & Answers Shell script to Split matrix file with delimiter into multiple files Post 303042222 by RudiC on Thursday 19th of December 2019 06:23:02 AM
Old 12-19-2019
This should work for exactly the data sample you presented; for "thousands of columns", additional efforts need to be spent, like closing output files after appending to them:


Code:
awk -F\; '
NR == 1 {for (i=5; i<=NF; i++)  {split ($i, T, "_")
                                 COL[T[1]] = COL[T[1]] OFS  i 
                                }
        }

        {for (c in COL) {n = split (COL[c], T)
                         OUT = $(T[2])
                         for (i=3; i<=n; i++) OUT = sprintf ("%s;%s", OUT, $(T[i]))
                         print $1, $2, $3, $4, OUT  >  (c ".txt")
                        }
        }
' OFS=\; file
---------- A.txt: ----------

ID1;ID2;ID3;ID4;A_1;A_2;A_3
AA;ax;ay;az;01;04;07
BB;bx;by;bz;03;44;27

---------- B.txt: ----------

ID1;ID2;ID3;ID4;B_1;B_2;B_3
AA;ax;ay;az;02;05;08
BB;bx;by;bz;05;15;08

---------- C.txt: ----------

ID1;ID2;ID3;ID4;C_1;C_2;C_3
AA;ax;ay;az;03;06;09
BB;bx;by;bz;33;26;09

 

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LEARN ABOUT DEBIAN

bb-csvinfo.cgi

BB-CSVINFO.CGI(1)					      General Commands Manual						 BB-CSVINFO.CGI(1)

NAME

       bb-csvinfo.cgi - CGI program to show host information from a CSV file

SYNOPSIS

       bb-csvinfo.cgi

DESCRIPTION

       bb-csvinfo.cgi  is  invoked  as	a CGI script via the bb-csvinfo.sh CGI wrapper.  Based on the parameters it receives, it searches a comma-
       separated file for the matching host, and presents the information found as a table.

       bb-csvinfo.cgi is passed a QUERY_STRING environment variable with the following parameters:

	  key (string to search for, typically hostname)
	  column (columnnumber to search - default 0)
	  db  (name of the CSV database file in $BBHOME/etc/, default hostinfo.csv)
	  delimiter (delimiter character for columns, default semi-colon)

       CSV files are easily created from e.g. spreadsheets, by exporting them in CSV format. You should have one host per  line,  with	the  first
       line  containing  the  column headings. Despite their name, the default delimiter for CSV files is the semi-colon - if you need a different
       delimiter, invoke bb-csvinfo.cgi with the "delimiter=<character>" in the query string.

Example usage
       This example shows how you can use the bb-csvinfo CGI. It assumes you have a CSV-formatted file with information about the hosts stored	as
       $BBHOME/etc/hostinfo.csv, and the hostname is in the first column of the file.

       Use with the bbgen --docurl
	      The  --docurl  option to bbgen(1) sets up all of the hostnames on your Xymon webpages to act as links to a CGI script. To invoke the
	      bb-csvinfo CGI script, run bbgen with the option

		 --docurl=/cgi-bin/bb-csvinfo.sh?db=hostinfo.csv&key=%s

SEE ALSO

       bb-hosts(5), hobbitserver.cfg(5), bbgen(1)

Xymon							    Version 4.2.3:  4 Feb 2009						 BB-CSVINFO.CGI(1)
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