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Top Forums Shell Programming and Scripting Compare two variables and print the difference Post 303037567 by wisecracker on Tuesday 6th of August 2019 08:26:05 AM

Old

08-06-2019

Registered User

Hi amar1208...

Just a note reference rdrtx1's post #2:
The first line should read something like #!/bin/bash as 'sh' assumes POSIX compatibility so ARRAYS are technically not possible.
Make sure you are using bash, ksh or another advanced shell to get that facility.

--- Post updated at 02:26 PM ---

I hope this does not attach itself to my previous:
RudiC's code works absolutely fine on bash version:

Code:

GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin18)
Copyright (C) 2007 Free Software Foundation, Inc.

Modified with real commands and fixed values:

Code:

#!/bin/bash
PRIM_SEQ=($( python -c "print('200 100')" ))
STDBY_SEQ=($( echo "50 20" ))
for i in ${!PRIM_SEQ[*]}; do echo $(( PRIM_SEQ[i] - STDBY_SEQ[i] )); done

Note to RudiC:
'STB_SEQ' should read 'STDBY_SEQ'...

Last edited by wisecracker; 08-06-2019 at 09:42 AM.. Reason: Sigh, second upload attached to my previous!

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LEARN ABOUT OPENSOLARIS

compare

compare(1)						      General Commands Manual							compare(1)

NAME

       compare - mathematically and visually annotate the difference between an image and its reconstruction.

SYNOPSIS

       compare input-file input-file [options] output-file

OVERVIEW

       The  compare  program  is  a  member  of  the ImageMagick(1) suite of tools.  Use it to mathematically and visually annotate the difference
       between an image and its reconstruction.

       For more information  about  the  compare  command,  point  your  browser  to  file:///usr/share/doc/ImageMagick-6.3.4/www/compare.html	or
       http://www.imagemagick.org/script/compare.php.

DESCRIPTION

       Image Settings:
	 -authenticate value  decrypt image with this password
	 -channel type	      apply option to select image channels
	 -colorspace type     alternate image colorspace
	 -compress type       type of pixel compression when writing the image
	 -debug events	      display copious debugging information
	 -define format:option
			      define one or more image format options
	 -density geometry    horizontal and vertical density of the image
	 -depth value	      image depth
	 -extract geometry    extract area from image
	 -format "string"     output formatted image characteristics
	 -fuzz distance       colors within this distance are considered equal
	 -help		      print program options
	 -identify	      identify the format and characteristics of the image
	 -interlace type      type of image interlacing scheme
	 -limit type value    pixel cache resource limit
	 -log format	      format of debugging information
	 -metric type	      measure differences between images with this metric
	 -monitor	      monitor progress
	 -profile filename    add, delete, or apply an image profile
	 -quality value       JPEG/MIFF/PNG compression level
	 -quiet 	      suppress all warning messages
	 -quantize colorspace reduce colors in this colorspace
	 -regard-warnings     pay attention to warning messages
	 -sampling-factor geometry
			      horizontal and vertical sampling factor
	 -set attribute value set an image attribute
	 -size geometry       width and height of image
	 -transparent-color color
			      transparent color
	 -type type	      image type
	 -verbose	      print detailed information about the image
	 -version	      print version information
	 -virtual-pixel method
			      virtual pixel access method

       By  default, the image format of `file' is determined by its magic number.  To specify a particular image format, precede the filename with
       an image format name and a colon (i.e. ps:image) or specify the image type as the filename suffix (i.e. image.ps).  Specify 'file'  as  '-'
       for standard input or output.

SEE-ALSO
       ImageMagick(1)

COPYRIGHT

       Copyright    (C)   1999-2007   ImageMagick   Studio   LLC.   Additional	 copyrights   and   licenses   apply   to   this   software,   see
       file:///usr/share/doc/ImageMagick-6.3.4/www/license.php or http://www.imagemagick.org/script/license.php

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWimagick     |
       +--------------------+-----------------+
       |Interface Stability | External	      |
       +--------------------+-----------------+
NOTES

       Source for ImageMagick is available on http://opensolaris.org.

ImageMagick						     Date: 2005/03/01 01:00:00							compare(1)