awk file reading doubt

Thread Tools Search this Thread
Top Forums Shell Programming and Scripting awk file reading doubt
# 1  
Old 07-07-2011
awk file reading doubt


Using this trivial code, I am trying to insert/paste the single column data of a file into the second column (field 2) of a multi-column text file.
awk 'FNR==NR {a[FNR]=$0; next} {$1=$1 OFS a[FNR]}1' single-column-file  multi-column-file

Lets consider the single-column-file as 'f2' and multi-column file as 'f1'.

I know that the array a[FNR] is having the single column data of file f2 and I am just replacing $1 of file f1 with the first field of f1 + output-field-separator + a[FNR]. My question is, how does the other columns (after the 1st column of f1) get appended?
# 2  
Old 07-07-2011
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Issues in reading file using 'awk'

Dear all, I am using following function of some script to assign variable "JobNo" some value form file $SAMPLE"_status.log" ( generated using the red color command ) crab ntuplize_crab -status -c $SAMPLE >& $SAMPLE"_status.log" & echo $SAMPLE"_status.log" "=====" jobNo=$(awk... (10 Replies)
Discussion started by: emily
10 Replies

2. Shell Programming and Scripting

Reading data from file using awk

I have a file as below. It contains two data sets separated by >. I want to pipe each data set to another program called psxy. How can I get the different records Have started doing as follows but it only passes the first data set awk 'BEGIN {RS=">"};{print $0}' p.dat cat p.dat... (12 Replies)
Discussion started by: kristinu
12 Replies

3. Shell Programming and Scripting

awk issue while reading from file in while do

Hi Friends, I am trying to scan line by line using awk and pull the values and pass it in variables and then will use the variables but doesn't work. Please see below for details. #more ---------------------------------- #!/bin/bash . $HOME/.bash_profile while read line do... (6 Replies)
Discussion started by: narunice
6 Replies

4. Shell Programming and Scripting

Doubt with rearranging file through awk

Filename1.xml NO 2012-11-16 02:00:27 20121115/pathname/ asia Filename1.rec YES 2012-11-16 01:20:24 20121115/pathname asia FIleName2.xml YES 2012-11-16 01:20:25 20121115/pathaname asia if the file content are... (6 Replies)
Discussion started by: manas_ranjan
6 Replies

5. Shell Programming and Scripting

reading file awk or while

While read line query !!! Folks, I am working on a file which has entries as follows. I am using while read line to generate desired output as follows. filename1: Name : sdt2156157_ID NOS : 4567 NOS : 2348 Name : sdt2156158_ID NOS : 4987 NOS :... (3 Replies)
Discussion started by: dynamax
3 Replies

6. Shell Programming and Scripting

AWK/Shell script for reading text file

Hello, I have a text file which has list of SQL Commands, from where I have grepped the lines where there is a specific string: grep <string> <file1> >> <file2> A sample of the file2 is: INSERT INTO PS_PWC_SP_ERN_DATA SELECT A.EMPLID ,B.COMPANY ,B.PAYGROUP , B.OTH_PAY FROM... (7 Replies)
Discussion started by: suddhasatwa_bha
7 Replies

7. Shell Programming and Scripting

awk- reading input file twice

Hello, I've been trying to come up with a solution for the following problem; I have an input file with two columns and I want to print as an output the first column without any changes but for the second column, I want to divide it by its last value. Example input: 1 9 2 10 3 11 4 12 5... (14 Replies)
Discussion started by: acsg
14 Replies

8. Shell Programming and Scripting

Reading a file several times with awk

Hi everyone, I was wondering if it's possible to read a file ("file2" in my example) more than once. In this example I want to print file2 entirely for each lines of file1: awk -F$'\t' '{ print $0 while ((getline < "file2") > 0) { print "\t"$0 } }' file1 It... (4 Replies)
Discussion started by: anthony.cros
4 Replies

9. Shell Programming and Scripting

Using awk to when reading a file to search and output to file

Hi, I am not sure if this will work or not. I am getting a syntax error. I am reading fileA, using an acct number field trying to see if it exists in fileB and output to new file. Can anyone tell me if what I am doing will work or should I attempt it another way? Thanks. exec < "${fileA}... (4 Replies)
Discussion started by: ski
4 Replies

10. Shell Programming and Scripting

Reading large file, awk and cut

Hello all, I have 2 files, the first (indexFile1) contains start offset and length for each record inside the second file. The second file can be very large, each actual record start offset and length is defined by the entry in indexFile1. Since there are no records separators wc-l returns 0 for... (1 Reply)
Discussion started by: gio001
1 Replies
Login or Register to Ask a Question