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Full Discussion: replace space with the help of sed
Top Forums Shell Programming and Scripting replace space with the help of sed Post 302523117 by zaxxon on Wednesday 18th of May 2011 02:34:41 AM
Old 05-18-2011
Code:
abc="`echo $temp|sed 's/ /\\\ /g'`"
echo $abc
mynameis\ arpit

# or

abc="$(echo $temp|sed 's/ /\\ /g')"
echo $abc
mynameis\ arpit

Seems the backticks need another backslash to preserve the backslash ie. 3 of them. When using $() instead it's ok with 2. Not quite sure why it is like that but hopefully somebody else can explain it. I added double quotes just to make sure the space in between will not issue a problem.
The square brackets are not needed as they represent a group of characters. You only have 1 single char.
Last edited by zaxxon; 05-18-2011 at 03:41 AM..
This User Gave Thanks to zaxxon For This Post:
thearpit
 

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LEARN ABOUT OPENSOLARIS

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)
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