With bash builtins you can perhaps avoid awk and improve efficiency: ---------- Post updated at 03:26 PM ---------- Previous update was at 02:57 PM ----------
If the input.file is static it can be read once before the outer loop.
Plus some more optimization ideas:
i want to print the column file using awk or cut in dynamic manner
like
trmp=2;temp1=1;temp3=2
awk 'BEGIN{OFS=IFS="\t"} {print $temp,$temp1,$temp3}' client_data.txt
or cut -f $temp1,$temp2,$temp3 -d"\t" file_name .
but it is showing error , In awk can i use variable as in printing... (36 Replies)
Hi guys,
I need help in extracting one column of numbers from two different files and display it in a output file. In specific, I want to extrac the column no.2 ($2) from each file, file1.txt, file2.txt. Then place both extracted columns in a one file, out.txt.
the line command I use to... (7 Replies)
Hello,
I have a question regarding the awk command. Here is the line I need to grep:
1 F= -.13250138E+03 E0= -.13249556E+03 d E =-.174650E-01 mag= 35.2157
Instead of displaying the number in red I would like to store it as a variable such as X. Is there a way to do this? Thanks for any... (3 Replies)
Hi
I have a log file which has outputs like the one below
conn=24,196 op=1 RESULT err=0 tag=0 nentries=9 etime=3,712 dbtime=0 mem=486,183,328/2,147,483,648
Now most of the time I am only interested in the time ( the first column) and a column that begins with etime i.e... (8 Replies)
Hello,
I have 2 columns (1st column has multiple entries but the corresponding values in the column 2 may be the same or different.) however I want to extract unique values for each entry in column 1 by assigning the max value from column 2
SDF4 -0.211654
SDF4 0.978068
... (1 Reply)
Hi everyone,
Ok here's the scenario.
I have a control file like this.
component1,file1,file2,file3,file4,file5
component2,file1,file2,file3,file4,file5I want to do a while loop here to read all files for each component.
file_count=2
while ]
do
file_name=`cat list.txt | grep... (2 Replies)
Hi ,
I need to extract data from below mentioned data, having no delimiter and havin no fixed column length.
For example:
Member nbr Ref no date
10000 1000 10202012
200000 2000 11202012
Output:
to update DB with memeber nbr on basis of ref no.
... (6 Replies)
This is a example TXT file:
ID CDR1 CDR2 CDR3
1 CDR1 CDR3
2 CDR1 CDR2 CDR3
3 CDR3
What I want to do is extract the fourth column with awk, however, there are some blank space in some field. I get wrong result when it print out awk result.
awk '{print $1,$4}'... (8 Replies)
I have tried the following to no avail.
xargs -n8 < test.txt
awk '{if(NR%6!=0){p=""}else{p="\n"};printf $0" "p}' Mod_Alm_log.txt > test.txt
I have tried different variations of the above, the problem is mixes lines together.
And it includes the tags "%a and %A" I need them to be all tab... (16 Replies)
Discussion started by: mytouchsr
16 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