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Top Forums Shell Programming and Scripting Deleting all the fields(columns) from a .csv file if all rows in that columns are blanks Post 302765949 by ks_reddy on Monday 4th of February 2013 01:20:59 AM
Old 02-04-2013
Deleting all the fields(columns) from a .csv file if all rows in that columns are blanks

Hi Friends,

I have come across some files where some of the columns don not have data.
Code:
Key, Data1,Data2,Data3,Data4,Data5 
A,5,6,,10,,
A,3,4,,3,,
B,1,,4,5,,
B,2,,3,4,,

If we see the above data on Data5 column do not have any row got filled. So remove only that column(Here Data5) and leave all the other column data as it is even tough there some cells with empty values.
In actual I have 100's of columns in my data with its own column filled in as per column1(Key).

Thanks
Sidda
 

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PR(1)							      General Commands Manual							     PR(1)

NAME
pr - print file SYNOPSIS
pr [ option ... ] [ file ... ] DESCRIPTION
Pr produces a printed listing of one or more files on its standard output. The output is separated into pages headed by a date, the name of the file or a specified header, and the page number. With no file arguments, pr prints its standard input. Options apply to all following files but may be reset between files: -n Produce n-column output. +n Begin printing with page n. -b Balance columns on last page, in case of multi-column output. -d Double space. -en Set the tab stops for input text every n spaces. -h Take the next argument as a page header (file by default). -in Replace sequences of blanks in the output by tabs, using tab stops set every n spaces. -f Use formfeeds to separate pages. -ln Take the length of the page to be n lines instead of the default 66. -m Print all files simultaneously, each in one column. -n Number the lines of each file. -on Offset the left margin n character positions. -sc Separate columns by the single character c instead of aligning them with white space. A missing c is taken to be a tab. -t Do not print the 5-line header or the 5-line trailer normally supplied for each page. -wn For multi-column output, take the width of the page to be n characters instead of the default 72. SOURCE
/sys/src/cmd/pr.c SEE ALSO
cat(1), lp(1) PR(1)
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