Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Fetching 1st Column and Last n Columns
Top Forums UNIX for Beginners Questions & Answers Fetching 1st Column and Last n Columns Post 302983113 by rbatte1 on Thursday 6th of October 2016 12:14:05 PM
Old 10-06-2016
Is it always a fixed number of columns in each file? If so, you could use cut:-
Code:
tab=$(printf "\t")                                             # Just defining the tab character for clarity

columns=$(set - $(head -1 input_file | tr " " "_") ; echo $#)  # Count number of columns today.  The tr eliminates spaces, just for counting columns

((start_col=$columns-99))                                      # Count back 99 columns (else you will get an extra one)

cut -d "$tab" -f1,${start_col}- input_file                     # Note the trailing hyphen on the field/column definition




Robin
Last edited by rbatte1; 10-06-2016 at 01:23 PM.. Reason: Defined tab character for clarity
This User Gave Thanks to rbatte1 For This Post:
RavinderSingh13
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to check Null values in a file column by column if columns are Not NULLs

Hi All, I have a table with 10 columns. Some columns(2nd,4th,5th,7th,8th and 10th) are Not Null columns. I'll get a tab-delimited file and want to check col by col and generate seperate error code for each col eg:102 if 2nd col value is NULL and 104 if 4th col value is NULL so on... I am a... (7 Replies)
Discussion started by: Mandab
7 Replies

2. UNIX for Dummies Questions & Answers

two files.say a and b.both have long columns.i wanna match the column fron 1st file w

ex: a file has : 122323 123456456 125656879 678989965t635 234323432 b has : this is finance no. this is phone no this is extn ajkdgag idjsidj i want the o/p as: 122323 his is finance no. 123456456 this is phone no 123456456 ... (4 Replies)
Discussion started by: TRUPTI
4 Replies

3. Shell Programming and Scripting

Help In fetching the 2nd Peak value of a column

Hi, We have a requirement of calculating the AVG, Peak and 2nd Peak (Say Peak2) of a column in a text file. We are able to get Avg and Peak but we are finding difficulty in getting the 2nd Peak. I tried using the AWK but in vainL. Please find the below Script i have written for fetching AVG and... (3 Replies)
Discussion started by: mahesh Madpathi
3 Replies

4. Shell Programming and Scripting

Combine columns from many files but keep them aligned in columns-shorter left column issue

Hello everyone, I searched the forum looking for answers to this but I could not pinpoint exactly what I need as I keep having trouble. I have many files each having two columns and hundreds of rows. first column is a string (can have many words) and the second column is a number.The files are... (5 Replies)
Discussion started by: isildur1234
5 Replies

5. Shell Programming and Scripting

Fetching columns from .csv file except last column

Hi, i have below list of files so i just want the name of the files in one parameter and not the timestamp. i want only GIDW_Dy_Tm_Seg_Sls_legacy_PL_0_0_ in variable of all files. GIDW_Dy_Tm_Seg_Sls_legacy_PL_0_0_20131001101800.csv GIDW_Dly_Sls_legacy_RO_0_0_20131001172001.csv ... (9 Replies)
Discussion started by: renuk
9 Replies

6. Shell Programming and Scripting

Fetching values in CSV file based on column name

input.csv: Field1,Field2,Field3,Field4,Field4 abc ,123 ,xyz ,000 ,pqr mno ,123 ,dfr ,111 ,bbb output: Field2,Field4 123 ,000 123 ,111 how to fetch the values of Field4 where Field2='123' I don't want to fetch the values based on column position. Instead want to... (10 Replies)
Discussion started by: bharathbangalor
10 Replies

7. UNIX for Dummies Questions & Answers

Want the UNIX code - I want to sum of the 1st column wherever the first 2nd and 3rd columns r equal

I have the code for the below things.. File1 has the content as below 8859 0 subscriberCreate 18 0 subscriberPaymentMethodChange 1650 0 subscriberProfileUpdate 7668 0 subscriberStatusChange 13 4020100 subscriberProfileUpdate 1 4020129 subscriberStatusChange 2 4020307 subscriberCreate 8831... (5 Replies)
Discussion started by: Mahen
5 Replies

8. Linux

Print the 1st column and the value in 2nd or 3rd column if that is different from the values in 1st

I have file that looks like this, DIP-17571N|refseq:NP_651151 DIP-17460N|refseq:NP_511165|uniprotkb:P45890 DIP-17571N|refseq:NP_651151 DIP-19241N|refseq:NP_524261 DIP-19241N|refseq:NP_524261 DIP-17151N|refseq:NP_524316|uniprotkb:O16797 DIP-19588N|refseq:NP_731165 ... (2 Replies)
Discussion started by: Syeda Sumayya
2 Replies

9. Shell Programming and Scripting

awk to Sum columns when other column has duplicates and append one column value to another with Care

Hi Experts, Please bear with me, i need help I am learning AWk and stuck up in one issue. First point : I want to sum up column value for column 7, 9, 11,13 and column15 if rows in column 5 are duplicates.No action to be taken for rows where value in column 5 is unique. Second point : For... (1 Reply)
Discussion started by: as7951
1 Replies

10. UNIX for Beginners Questions & Answers

Compare 1st column from 2 file and if match print line from 1st file and append column 7 from 2nd

hi I have 2 file with more than 10 columns for both 1st file apple,0,0,0...... orange,1,2,3..... mango,2,4,5..... 2nd file apple,2,3,4,5,6,7... orange,2,3,4,5,6,8... watermerlon,2,3,4,5,6,abc... mango,5,6,7,4,6,def.... (1 Reply)
Discussion started by: tententen
1 Replies

LEARN ABOUT DEBIAN

colrm

COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME

     colrm -- remove columns from a file

SYNOPSIS

     colrm [start [stop]]

DESCRIPTION

     The colrm utility removes selected columns from the lines of a file.  A column is defined as a single character in a line.  Input is read
     from the standard input.  Output is written to the standard output.

     If only the start column is specified, columns numbered less than the start column will be written.  If both start and stop columns are spec-
     ified, columns numbered less than the start column or greater than the stop column will be written.  Column numbering starts with one, not
     zero.

     Tab characters increment the column count to the next multiple of eight.  Backspace characters decrement the column count by one.

ENVIRONMENT

     The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7).

EXIT STATUS

     The colrm utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     awk(1), column(1), cut(1), paste(1)

HISTORY

     The colrm command appeared in 3.0BSD.

BSD
								  August 4, 2004							       BSD
All times are GMT -4. The time now is 05:43 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy