09-11-2009
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I want to read a large (~1-4Gb) txt file with fields separated by "," and line separator "\n". Unfortunately, file contains \x00 (zero ASCII) symbols
AWK treats them as end of line + it ignores reminder of the line after the \x00.
As a simple example:
echo "\0060\0061\000\0060\0063" | nawk... (6 Replies)
Discussion started by: Murfury
6 Replies
2. Shell Programming and Scripting
Need to compare minus symbol "-" with a column that contains minus on few rows.
the sample script awk I have written is
if ( '$COLUMN2' ~ "\-" ) {}
COLUMN2 is a shell variable. I just need the if condition checking the shell variable within the awk script. Below is the entire awk part... (14 Replies)
Discussion started by: kalee
14 Replies
3. Solaris
deleteing post (0 Replies)
Discussion started by: dshakey
0 Replies
4. Shell Programming and Scripting
File A
>answer is the predicted other than >bigger than two
>whatever isthere >out of mind
CGAHHAWWASSASS
SASAWEDSASSDDD
SSDDDEDEUJUYYS
>hello you are there other is what is that>you are not
serious>leave it
SSSAAAAAASS
ASWWQQDDD
WESEEWWWW
WEEEEEWSS
SJUJSGKKSSS
SWBVHJJWUW
>hi i... (3 Replies)
Discussion started by: cdfd123
3 Replies
5. Shell Programming and Scripting
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)
Discussion started by: Diya123
1 Replies
6. Shell Programming and Scripting
I just tried following
ls *.dat|sort -t"_" -k2n,2|while read f1 && read f2; do
awk '{print}' $f1
awk FNR==1'{print $1,$2,$3,$4,$5,"*","*","*" }' OFS="\t" $f2
awk '{print}' $f2
donegot following result
18-Dec-1983 11:45:00 AM 18.692 84.672 0 25.4 24
18-Dec-1983 ... (3 Replies)
Discussion started by: Akshay Hegde
3 Replies
7. Shell Programming and Scripting
Hi,
My input files is like this
axis1 0 1 10
axis2 0 1 5
axis1 1 2 -4
axis2 2 3 -3
axis1 3 4 5
axis2 3 4 -1
axis1 4 5 -6
axis2 4 5 1
Now, these are my following tasks
1. Print a first column for every two rows that has the same value followed by a string.
2. Match on the... (3 Replies)
Discussion started by: jacobs.smith
3 Replies
8. Shell Programming and Scripting
Trying to use awk to add a . to $4. The input and output is tab-delimeted, but the awk seems to add a . in front of $5 and is space-delimeted. It seems close, but I am not able to produce the desired output. Thank you :).
file
chr1 948895 949015 chr1:948895-949015 ISG15
chr1 ... (1 Reply)
Discussion started by: cmccabe
1 Replies
9. Shell Programming and Scripting
Hi
Just wondering ... do you have an example of context that would demonstrates how usefull the awk notation can efficiently be used ?
Thx :rolleyes: (6 Replies)
Discussion started by: ctsgnb
6 Replies
10. Shell Programming and Scripting
In the awk below which does execute I get output that is close, except for all the lines that start with a # are removed. Some lines have one others two or three and after the script adds the
ID= to the fields below the pattern in the awk, I can not seem to add the # lines back to the output. ... (5 Replies)
Discussion started by: cmccabe
5 Replies
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