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Full Discussion: awk based script to ignore all columns from a file which contains character strings
Top Forums Shell Programming and Scripting awk based script to ignore all columns from a file which contains character strings Post 302716149 by ks_reddy on Tuesday 16th of October 2012 03:57:46 AM
Old 10-16-2012
awk based script to ignore all columns from a file which contains character strings
Hello All,

I have a .CSV file where I expect all numeric data in all the columns other than column headers.
But sometimes I get the files (result of statistics computation by other persons) like below( sample data)

Code:
SNO,Data1,Data2,Data3
1,2,3,4
2,3,4,SOME STRING
3,4,Inf,5
4,5,4,4

I want to remove the columns where ever character strings( I cannot provide the complete list as it is unknown) appear in any row of a column.
So the output will be like this
Code:
SNo,Data1
1,2
2,3
3,4
4,5

I have 10000 columns in my file, so manually deleting all these columns taking lot of time.

Thanks
Sidda
 

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shtool-table

SHTOOL-TABLE.TMP(1)					      GNU Portable Shell Tool					       SHTOOL-TABLE.TMP(1)

NAME

       shtool-table - GNU shtool pretty-print a field-separated list

SYNOPSIS

       shtool table [-F|--field-sep sep] [-w|--width width] [-c|--columns cols] [-s|--strip strip] strsepstr...

DESCRIPTION

       This pretty-prints a list of strings as a table.

OPTIONS

       The following command line options are available.

       -F, --field-sep sep
	   Separate columns using sep. Default is ":".

       -w, --width width
	   Width of each column. Default is 15 characters.

       -c, --columns cols
	   Number of columns. Default is 3.

       -s, --strip strip
	   Strip off any characters past strip. Default is 79.

EXAMPLE

	#   shell script
	shtool table -F , -w 5 -c 4 "1,2,3,4,5,6,7,8,9,10,11,12"

HISTORY

       The GNU shtool table command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 1999 for GNU shtool.

SEE ALSO

       shtool(1), tr(1), fmt(1), sh(1), awk(1), sed(1).

18-Jul-2008							   shtool 2.0.8 					       SHTOOL-TABLE.TMP(1)
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