06-10-2013
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I have a file where dates in the form mm/dd/yyyy is the first field. How do I sort the file by the date field?
Thanks,
Duckman (6 Replies)
Discussion started by: Duckman
6 Replies
2. UNIX for Dummies Questions & Answers
Hi at all,
I have to sort a log file on timestamp field. That's field is the third!
a log file sample.....
1|EVTVOD-1-20060709_000614|2006/07/09-0:11:23|0.3.8
1|EVTVOD-1-20060709_000614|2006/07/09-0:11:16|0.3.8
1|EVTVOD-1-20060709_000614|2006/07/09-0:11:20|0.3.8... (3 Replies)
Discussion started by: nmilella
3 Replies
3. Shell Programming and Scripting
Hi,
I have a list of files that take on the format ABCDE_yymmdd and wish to sort them in ascending date order. I can't use the unix time stamp for the file as this could possibly be different from the date given in the file name.
Does anyone know of any way this can be done using unix shell... (14 Replies)
Discussion started by: LiquidChild
14 Replies
4. UNIX for Dummies Questions & Answers
Hi guys... I've been trying to do this for ages. Maybe you can help.
I have log files like the examples below and I have grepped out certain lines from the files so that I can get an idea of who is logging on and how. So now I have the information in a new file but it is now in a different order... (7 Replies)
Discussion started by: padmundo
7 Replies
5. UNIX and Linux Applications
I'm not sure if this really belongs anywhere on this forum but my previous experiences on here have shown me that you guys are very helpful so I figure I may as well try.
I have a bunch of large 2d arrays in matlab and each has a column for a date that each row corresponds to. The format is... (1 Reply)
Discussion started by: skray
1 Replies
6. Shell Programming and Scripting
I am trying to sort by two columns. The first column in an ID, the second is a date in the form yyyy-mm-dd. I need to sort by the ID column, then in ascending order for the date column (earliest date to most recent date compared to today).
Input data:
012-abc 2012-04-25 ... (3 Replies)
Discussion started by: mollydog11
3 Replies
7. Shell Programming and Scripting
Hello.
Sorting data file by date and time with the following issues:
Date is in the following format m/d/yyyy, no leading zeros
Time is in the following format h:m:s AM/PM, no leading zeros
Any ideas on how to sort data when the above issues?
Could the date/time be converted inline to... (5 Replies)
Discussion started by: JimBurns
5 Replies
8. UNIX for Dummies Questions & Answers
I have file having below data
01-MAY-13 2.38.11.00.100089 IN 4512 0000741881
01-JUN-13 2.38.11.00.100089 IN 1514 0000764631
01-NOV-13 2.38.11.00.100089 IN 1514 0000856571
01-NOV-13 2.38.15.00.100015 IN 300.32 0000856531
01-JUN-13 2.38.19.00.100000 IN 2698 0000764493
01-JUL-13... (2 Replies)
Discussion started by: ranabhavish
2 Replies
9. Shell Programming and Scripting
I have file a.txt having below data
cat a.txt
01-MAY-13 2.38.11.00.100089 IN 4512 0000741881
01-JUN-13 2.38.11.00.100089 IN 1514 0000764631
01-NOV-13 2.38.11.00.100089 IN 1514 0000856571
01-NOV-13 2.38.15.00.100015 IN 300.32 0000856531
01-JUN-13 2.38.19.00.100000 IN 2698 0000764493... (5 Replies)
Discussion started by: ranabhavish
5 Replies
10. UNIX for Dummies Questions & Answers
Hi all,
I have a file with a list of rpm's that have different dates. I am trying to just grab the latest rpm and install date, and discard the rest. The file has 1000's of entries all with different names and dates.
I have tried sort -k on the file and I am not grabbing the info,
... (4 Replies)
Discussion started by: gartie
4 Replies
LEARN ABOUT ULTRIX
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)