I would like to remove some lines from begining of file (header) and some lines from end of file (footer).
The header/footer lines generated by web-browser when the user upload a file to my webserver.
Example:
-----------------------------7d62af20c052c
Content-Disposition: form-data;... (2 Replies)
I have a '~' delimited file of 6 - 7 million rows. Each row should contain 13 columns delimited by 12 ~'s. Where there are 13 tildes, the row needs to be removed. Each row contains alphanumeric data and occasionally a ~ ends up in a descriptive field and therefore acts as a delimiter, resulting in... (1 Reply)
Hi to all,this is my first post here.
I've a file as
name
89
78
09
67
othername
how I can remove the word name and othername from this file, and an eventually blank row in it?Thanks in advance. (2 Replies)
Hi All,
I need to remove 1st 2 line from head and last 2 line from last.
I thought it would be possible by using the Head and tail command.
But after i am using it is not possible by it.
Example:Input file
1
2
3
4
5
Example: Output file
3
But my head and tail command are not... (12 Replies)
Hello friends,
I have a file which consists of many rows, I use a couple of commands to convert it so i can use in a database query for filtering. I need the first columns (msisdns) in a row, seperated with commas,
9855162267,4,5,2010-11-03 17:02:07.627
9594567938f,5,5,2010-11-02... (9 Replies)
Hello All, I am having a problem in automating my UNIX Script to remove the blank spaces in between records. When I incorporate it into my script, the output file is deleting the whole content :confused:
Basically this is what I am trying to do:
File contains data like this:... (14 Replies)
Hi All,
I have a big file with 232 columns and 9 million rows, I want to delete all rows with same column values in col3 through col232. Also the output should be sorted based on first 2 columns.
Here is a reduced example with 6 columns. I want to remove rows with duplicate values in col3... (9 Replies)
Hello everyone, I have a dataset that looks something like:
1 3
2 2
3 4,5
4 3:9
5 5,9
6 5:6
I need to remove the rows that contain a comma in the second column and I'm not sure how to go about this. Here is an attempt.
awk 'BEGIN {FS=" "} { if ($2!==,) print }'Any help is appreciated. (5 Replies)
Hello,
I am new beginner, and just got help from this forum. The command line is :awk '($1, $2) in x {
print x
print
delete x
next
}
{ x = $0
}' results>myfileI got a output "myfile" from the orginal file 'results'. The quesion is I don't know how to get all rows... (7 Replies)
Discussion started by: nengcheng
7 Replies
LEARN ABOUT ULTRIX
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)