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Full Discussion: Othen then if/sed - search and replace
Top Forums Shell Programming and Scripting Othen then if/sed - search and replace Post 302814211 by onesuri on Wednesday 29th of May 2013 03:24:42 AM
Old 05-29-2013
Othen then if/sed - search and replace
Code:
i am able to achieve using if and elif. but we have 2000 hard code values then the code is big
based on the forums, tried sed [sed -e 's/10/6000/' -e 's/20/2000/' and so on] but that is also code is big.
Any direct command which give the  ouput.
sample example

a=we get some value

echo $a

if  $a value is 10 then 6000
elif  $a value is 20 then 2000
elif  $a value is 30 then 2000
-
-
-
-
elif $a value is 20000 then 500
so on

ex: a=20
output =2000

ex2 a=30
output=2000

 

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LEARN ABOUT FREEBSD

pnmdepth

pnmdepth(1)                                                   General Commands Manual                                                  pnmdepth(1)

NAME

       pnmdepth - change the maxval in a portable anymap

SYNOPSIS

       pnmdepth newmaxval [pnmfile]

DESCRIPTION

       Reads a portable anymap as input.  Scales all the pixel values, and writes out the image with the new maxval.  Scaling the colors down to a
       smaller maxval will result in some loss of information.

       Be careful of off-by-one errors when choosing the new maxval.  For instance, if you want the color values to be five bits wide, use a  max-
       val of 31, not 32.

       One  important  use  of pnmdepth is to convert a new format 2-byte-per-sample PNM file to the older 1-byte-per-sample format.  Before April
       2000, essentially all raw (binary) format PNM files had a maxval less than 256 and one byte per sample, and many programs may rely on that.
       If  you  specify  a  newmaxval  less than 256, the resulting file should be readable by any program that worked with PNM files before April
       2000.

SEE ALSO

       pnm(5), ppmquant(1), ppmdither(1)

AUTHOR

       Copyright (C) 1989, 1991 by Jef Poskanzer.

                                                                   08 April 2000                                                       pnmdepth(1)
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