10-22-2008
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello,
I`m new with the Unix and Linux stuff. But I want to learn something about it.
Now`s my question what does:
everthing is a file
means??
Could some body explane this to me?
thx (2 Replies)
Discussion started by: Loodgieter
2 Replies
2. Shell Programming and Scripting
I have some files where numbers are part of like
eg 1add1.txt
23sub41.txt etc
I want to remove numbers from the filenames(whereever it may be).
I used echo `ls *.txt | sed -e "s///"`
But its removing first digits like 1add1.txt becomes add1.txt
My intention is to make 1add1.txt... (3 Replies)
Discussion started by: villain41
3 Replies
3. Shell Programming and Scripting
I have a file which has about 10000 records and I need to delete about 50 records from the file. I know line numbers and am using
sed '134,1357,......d' filename > new file.
It does not seem to be working.
Please Advice (5 Replies)
Discussion started by: mad_man12
5 Replies
4. Shell Programming and Scripting
Hi,
I have a file will 1000 lines.... I want to deleted some line in the file... like 800-850 lines i want to remove in that...
can somebody help me..?
thanks. (2 Replies)
Discussion started by: Kattoor
2 Replies
5. UNIX for Dummies Questions & Answers
Dear all,
I have one file (see below) with more then 100 columns, and need only column which has GType in label with Alphabets, please help me to remove this columns with numbers.
input file is
n.201.GType n-201.Theta n-201.R n_1.GType n_1.Theta n_1.R n_7.GType ... (1 Reply)
Discussion started by: AAWT
1 Replies
6. UNIX for Dummies Questions & Answers
Dear all,
I have one file (see below) with more then 100 columns and 2500 rows, and need only column which has GType in label with Alphabets, please help me to remove these columns with numbers.
input file is
n.201.GType n-201.Theta n-201.R n_1.GType n_1.Theta n_1.R... (6 Replies)
Discussion started by: AAWT
6 Replies
7. Shell Programming and Scripting
Hello Experts..
I have 3-4 C codes with Oracle SQL statements embedded. All the SQL statements starts with EXEC SQL keyword and ends with ;. I want to extract all the SQL statements out of these codes.
I did awk '/^EXEC SQL/,/\;/' inputFile (I use this on all of the codes individually). That... (2 Replies)
Discussion started by: juzz4fun
2 Replies
8. Shell Programming and Scripting
We are using Red Hat Linux.
I have a flat file with among other things, the following lines, which appear occasionally throughout the file:
Using sed, I delete this line:
L;L;L;L;R;R;R;L;R;L;R;R;R;L;L;L
With:
/^;;;;;*/d
Works fine every time.
However, I cannot delete... (6 Replies)
Discussion started by: bloomlock
6 Replies
9. Shell Programming and Scripting
I have a file of the following format:
$data1 size 1278
dataw
datat
datau
datai
$data2 size 456
datak
dataf
datat
datay
datal
$data3 size 154
datag
datas
datat
datar
datas (8 Replies)
Discussion started by: FelipeAd
8 Replies
10. Shell Programming and Scripting
Hello,
I've got a list of a single column numbers like
3000.66
3002.55
3062.23
3242.12
etc...
I would like to delete all numbers higher than for example 3060.00 and lower
than 2990.00
How can I do that?
Thanks in advance (2 Replies)
Discussion started by: Board27
2 Replies
LEARN ABOUT PHP
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)