04-21-2015
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have a pipe delimited file. Key is field 2, date is field 5 (as example, my real file is more complicated of course, but the KEY and DATE are accurate)
There can be duplicate rows for a key with different dates.
I need to keep only rows with latest date in this case.
Example data: ... (4 Replies)
Discussion started by: LisaS
4 Replies
2. Shell Programming and Scripting
I want to write a scrpit to merge files row wise (actually concatinating)
main.txt
X Y Z
file 1
A B C
file 2
1 2 3
now i want the script to check if the file1 is empty or not, if empty then make it like
A B C
1 2 3
again to check if second file is empty if not do as done... (0 Replies)
Discussion started by: shashi792
0 Replies
3. Shell Programming and Scripting
Hello All:
I've file in below format. File name is "FIRSTN.TBL":
AAAAAA N
BBBBBBBBBBBBBBBBBBBBBBB N
.
.
.
.
ZZZZZZZZZZZZZZZZZZZZZZZZZZ N
My file row length is 40 characters and my second column will start from 25th column and it is only... (3 Replies)
Discussion started by: nvkuriseti
3 Replies
4. Shell Programming and Scripting
cat file1.txt
field1 "user1":
field2:"data-cde"
field3:"data-pqr"
field4:"data-mno"
field1 "user1":
field2:"data-dcb"
field3:"data-mxz"
field4:"data-zul"
field1 "user2":
field2:"data-cqz"
field3:"data-xoq"
field4:"data-pos"
Now i need to have the date like below.
i have just... (7 Replies)
Discussion started by: ckaramsetty
7 Replies
5. Shell Programming and Scripting
Hi, I need somebody's help with sorting data with awk.
I've got a file:
10 aaa 4584
12 bbb 6138
20 ccc 4417
21 ddd 7796
10 eee 7484
12 fff ... (5 Replies)
Discussion started by: killerbee
5 Replies
6. Shell Programming and Scripting
Hello,
How to sort each row in a document with numerical values and with more than one row. Example
Input data (file1.txt):
4 6 8 1 7
2 12 9 6 10
6 1 14 5 7
and I want the the output to look like this(file2.txt):
1 4 6 7 8
2 6 9 10 12
1 5 6 7 14
I've tried
sort -n file1.txt >... (12 Replies)
Discussion started by: joseamck
12 Replies
7. Shell Programming and Scripting
Hi Friends,
I have a single column data like below.
1
2
3
4
5
I need the output like below.
0
1
2
3
4
where each row (including first row) subtracting from first row and the result should print below like the way shown in output file.
Thanks
Sid (11 Replies)
Discussion started by: ks_reddy
11 Replies
8. UNIX for Dummies Questions & Answers
file with this content
awk 'NR==1 {print $4} && NR==2 {print $5}' file
The error is shown with syntax error; what can be done (4 Replies)
Discussion started by: cdfd123
4 Replies
9. Shell Programming and Scripting
I am trying to awk the output from below output for each port: i need separate line with comma
source file
Output required (3 Replies)
Discussion started by: ranjancom2000
3 Replies
10. UNIX for Beginners Questions & Answers
Dear all, will be thankful if you can help on sort command.
My data looks like (tab separated; number of columns 2317; N of rows ~200000):
a b c d V10 V2 V8 V4 V7
xx z y 1000 1 2 0 2 0
tr v m 1001 0 0 1 2 2
rg s ... (7 Replies)
Discussion started by: kush
7 Replies
pbmreduce(1) General Commands Manual pbmreduce(1)
NAME
pbmreduce - read a portable bitmap and reduce it N times
SYNOPSIS
pbmreduce [-floyd|-fs|-threshold ] [-value val] N [pbmfile]
DESCRIPTION
Reads a portable bitmap as input. Reduces it by a factor of N, and produces a portable bitmap as output.
pbmreduce duplicates a lot of the functionality of pgmtopbm; you could do something like pnmscale | pgmtopbm, but pbmreduce is a lot
faster.
pbmreduce can be used to "re-halftone" an image. Let's say you have a scanner that only produces black&white, not grayscale, and it does a
terrible job of halftoning (most b&w scanners fit this description). One way to fix the halftoning is to scan at the highest possible res-
olution, say 300 dpi, and then reduce by a factor of three or so using pbmreduce. You can even correct the brightness of an image, by
using the -value flag.
OPTIONS
By default, the halftoning after the reduction is done via boustrophedonic Floyd-Steinberg error diffusion; however, the -threshold flag
can be used to specify simple thresholding. This gives better results when reducing line drawings.
The -value flag alters the thresholding value for all quantizations. It should be a real number between 0 and 1. Above 0.5 means darker
images; below 0.5 means lighter.
All flags can be abbreviated to their shortest unique prefix.
SEE ALSO
pnmenlarge(1), pnmscale(1), pgmtopbm(1), pbm(5)
AUTHOR
Copyright (C) 1988 by Jef Poskanzer.
02 August 1989 pbmreduce(1)