Sponsored Content
Top Forums Shell Programming and Scripting Deleting all the fields(columns) from a .csv file if all rows in that columns are blanks Post 302765959 by pamu on Monday 4th of February 2013 01:47:17 AM
Old 02-04-2013
Try sth like this.

Code:
 
$awk -F "," 'NR==FNR{for(i=1;i<=NF;i++){if($i == ""){X[i]++;}};x=NR;next}{for(i=1;i<=NF;i++){if(X[i] != (x-1)){s=s?s","$i:$i}}print s;s=""}' file file
 
Key, Data1,Data2,Data3,Data4
A,5,6,,10
A,3,4,,3
B,1,,4,5
B,2,,3,4


Last edited by pamu; 02-04-2013 at 05:04 AM.. Reason: Corrected..
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

deleting rows & columns form a csv file

Hi , I want to delete some rows & columns from file. can someone please help me on this? Regards. (2 Replies)
Discussion started by: code19
2 Replies

2. Shell Programming and Scripting

Deleting columns from CSV file

Hi All, Am working on perl script which should delete columns in existing CSV file. If my file is : AA,BB,CC,DD 00,11,22,33 00,55,66,77 00,99,88,21 AA,BB... are all my headers can come in any order (e.g AA,CC,BB...) and rest are values. I want to delete column CC... Can anybody help... (2 Replies)
Discussion started by: darshakraut
2 Replies

3. Shell Programming and Scripting

deleting rows that dont have a certain # of columns

Hi, I want to delete rows that dont have a certain # of columns. In my case, rows that are less than 8 should be removed (those greater than 8 are ok). For instance: 1 2 3 4 5 6 7 8 2 3 2 4 3 2 1 5 1 2 3 4 5 6 8 2 2 4 3 1 1 1 1 1 1 1 1 1 after: 1... (8 Replies)
Discussion started by: gisele_l
8 Replies

4. UNIX for Advanced & Expert Users

Unix Bash: substitute columns in .csv using other .csv columns

Hi All, I have two .csv's input.csv having values as (7 columns) ABC,A19907103,ABC DEV YUNG,2.17,1000,2157,07/07/2006 XYZ,H00213850,MM TRUP HILL,38.38,580,23308,31/08/2010 output.csv having (25 columns) A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y... (4 Replies)
Discussion started by: abhivyas
4 Replies

5. UNIX for Dummies Questions & Answers

Deleting all rows with empty columns

I have a text file that looks like this: 1 rs523634 8.22486 1 1 rs585160 8.22488 1 rs497228 8.2249 1 1 rs600933 8.225 1 rs480106 8.22531 1 rs600199 8.22533 1 rs529015 8.22534 1 rs598894 8.22534 I want to delete the rows with empty... (2 Replies)
Discussion started by: evelibertine
2 Replies

6. UNIX for Advanced & Expert Users

Help in Deleting columns and Renaming Mutliple columns in a .Csv File

Hi All, i have a .Csv file in the below format startTime, endTime, delta, gName, rName, rNumber, m2239max, m2239min, m2239avg, m100016509avg, m100019240max, metric3min, m100019240avg, propValues 11-Mar-2012 00:00:00, 11-Mar-2012 00:05:00, 300.0, vma3550a, a-1_CPU Index<1>, 200237463, 0.0,... (9 Replies)
Discussion started by: mahi_mayu069
9 Replies

7. Shell Programming and Scripting

Converting rows to columns in csv file

Hi, I have a requirement to convert rows into columns. data looks like: c1,c2,c3,.. r1,r2,r3,.. p1,p2,p3,.. and so on.. output shud be like this: c1,r1,p1,.. c2,r2,p2,.. c3,r3,p3,.. Thanks in advance, (12 Replies)
Discussion started by: Divya1987
12 Replies

8. Shell Programming and Scripting

Evaluate 2 columns, add sum IF two columns match on two rows

Hi all, I know this sounds suspiciously like a homework course; but, it is not. My goal is to take a file, and match my "ID" column to the "Date" column, if those conditions are true, add the total number of minutes worked and place it in this file, while not printing the original rows that I... (6 Replies)
Discussion started by: mtucker6784
6 Replies

9. Shell Programming and Scripting

Compare 2 csv files by columns, then extract certain columns of matcing rows

Hi all, I'm pretty much a newbie to UNIX. I would appreciate any help with UNIX coding on comparing two large csv files (greater than 10 GB in size), and output a file with matching columns. I want to compare file1 and file2 by 'id' and 'chain' columns, then extract exact matching rows'... (5 Replies)
Discussion started by: bkane3
5 Replies

10. Shell Programming and Scripting

Extracting data from specific rows and columns from multiple csv files

I have a series of csv files in the following format eg file1 Experiment Name,XYZ_07/28/15, Specimen Name,Specimen_001, Tube Name, Control, Record Date,7/28/2015 14:50, $OP,XYZYZ, GUID,abc, Population,#Events,%Parent All Events,10500, P1,10071,95.9 Early Apoptosis,1113,11.1 Late... (6 Replies)
Discussion started by: pawannoel
6 Replies
IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
All times are GMT -4. The time now is 09:01 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy