07-30-2012
Thanks a lot
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1. Shell Programming and Scripting
Hi all, I need some help on switching field/column values. For example I have a file name data.txt which contains:
a b
a b
a b
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b a
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b a
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2. Shell Programming and Scripting
I want to find the top N entries for a certain field based on the values of another field.
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Entry1 ||| 100
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3. Shell Programming and Scripting
Hi
I have a pipe delimited file. I am trying to grab the DISTINCT value from the second field. The file is something like:
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Thanks
simi (4 Replies)
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4. Shell Programming and Scripting
I've got a long logfile of the form
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5. Shell Programming and Scripting
hi
i have file as below , i want to add duplicate records like bell_bb to one record with valuve as 15 ( addition of both )
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Hi,
I have a file like this
A Bob
A Sam
A John
B David
C Paul
C Sandra
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7. Shell Programming and Scripting
Hi All,In my file there are 2 fields separated by space.Sample content of file are as follows:
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Hello all,
Maybe you can help me with an awk script to get what I need.
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How can I select the bold fields from the following?
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LEARN ABOUT FREEBSD
ppmtosixel
ppmtosixel(1) General Commands Manual ppmtosixel(1)
NAME
ppmtosixel - convert a portable pixmap into DEC sixel format
SYNOPSIS
ppmtosixel [-raw] [-margin] [ppmfile]
DESCRIPTION
Reads a portable pixmap as input. Produces sixel commands (SIX) as output. The output is formatted for color printing, e.g. for a DEC
LJ250 color inkjet printer.
If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled. A printer control header and a color assignment table
begin the SIX file. Image data is written in a compressed format by default. A printer control footer ends the image file.
OPTIONS
-raw If specified, each pixel will be explicitly described in the image file. If -raw is not specified, output will default to com-
pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands. A raw file is often an order of magni-
tude larger than a compressed file and prints much slower.
-margin
If -margin is not specified, the image will be start at the left margin (of the window, paper, or whatever). If -margin is speci-
fied, a 1.5 inch left margin will offset the image.
PRINTING
Generally, sixel files must reach the printer unfiltered. Use the lpr -x option or cat filename > /dev/tty0?.
BUGS
Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion. If the original PPM maxval was
greater than 100, rescaling also reduces the image depth. While the actual RGB values from the ppm file are more or less retained, the
color palette of the LJ250 may not match the colors on your screen. This seems to be a printer limitation.
SEE ALSO
ppm(5)
AUTHOR
Copyright (C) 1991 by Rick Vinci.
26 April 1991 ppmtosixel(1)