08-11-2010
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I currently have many log files for different webpages inside the folder /log/. The program allows the user to enter a month and then the grep function searches for it, the command i used is below:
grep -c "$month" ./log/*.log
This works and i can ascertain the number of matches, but I... (10 Replies)
Discussion started by: Jaken
10 Replies
2. Shell Programming and Scripting
Hi, I have used the following code to sort two sets of data:
awk '{printf "%10s %s\n",$1,$2}'
The first column is text and the second involves numbers. I was just wondering how i would go about sorting the second number so that they ascend from the top?
Thanks for any help (4 Replies)
Discussion started by: Jaken
4 Replies
3. Shell Programming and Scripting
i have following file have following type of data
1~%%~fcashfafh~%%~9797
can i sort(numeric) the file on first field and then on last feild using awk (3 Replies)
Discussion started by: mahabunta
3 Replies
4. Shell Programming and Scripting
Hi,
I have a file which is:-
1 6 4 8 2 3
2 1 9 3 2 1
3 3 5 6 3 1
4 9 7 8 2 3
I would like to sort from field $2 to field $6 for each of the line to:-
1 2 3 4 6 8
2 1 1 2 3 9
3 1 3 3 5 6
4 2 3 7 8 9
I came across this Arrays on example 26-6. But it is much complicated. I am... (7 Replies)
Discussion started by: ahjiefreak
7 Replies
5. Shell Programming and Scripting
I need to sort this input using sed, awk or any other tool to give below output
Input:
RXOCF-8
CLASS 2A
57
RU
40
RXORX-8-0
CLASS 1B
23 45 16
RXORX-8-1
EXTERNAL CLASS 2A (12 Replies)
Discussion started by: aydj
12 Replies
6. Shell Programming and Scripting
I have an array with five columns and i want to write it to a file.
Before writing it i must sort it using the field in the fifth column.
_________________________________________
|field 1|field 2|field 3|field 4|field 5|
| | | | | |
| | | |... (6 Replies)
Discussion started by: beatblaster666
6 Replies
7. Shell Programming and Scripting
Hello all, I am new here and *relatively* new to Unix. I have a bit of an emergency. I have a three column file that I need to sort:
sample name, miRNA, reads per million (RPM)
There are multiple samples, and for each sample name there are multiple miRNAs and associated RPMs. Some of these... (6 Replies)
Discussion started by: dunnybocter
6 Replies
8. Shell Programming and Scripting
Hello,
I have a file which has the following format: I have to do is sort individual records in the file based on the 4th field. Each record starts with "Module". Is there an easy way to do this using awk. I have tried piping output from awk to sort and also using "sort" inside awk but... (8 Replies)
Discussion started by: fifteate
8 Replies
9. UNIX for Dummies Questions & Answers
Hi ,
I have a file which has a large number of sequences of type:
gi_1
AASSKSKSKSSKSKSK....
series_121
DDKFKFKGKGKH
gi_3
FFFFLFFLFLFLF
series_1
DFFFFFF
pattern_3
GEEEEEEEEE
gi_2
HKKGGKGKGK
series_102
HHHHH
pattern_1 (2 Replies)
Discussion started by: siya@
2 Replies
10. Homework & Coursework Questions
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
You will write a script that will read a tab-separated file that contains the names of all 50 states &... (7 Replies)
Discussion started by: tburns517
7 Replies
LEARN ABOUT OSF1
pbmreduce
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)