NAME

       Arithmetic - arithmetic operations on images and numbers

SYNOPSIS

       astarithmetic [OPTION...] ASTRdata or number [ASTRdata] OPERATOR ...

DESCRIPTION

       Arithmetic  is  part  of GNU Astronomy Utilities 0.5.  Arithmetic will do arithmetic operations on one or
       multiple images and numbers.  Simply put, the name of the image along with the arithmetic  operators  and
       possible  numbers  are  given  as  arguments.  The  extensions of each input are specified with (possibly
       multiple) calls to the `--hdu' option.

       Currently Arithmetic only supports postfix or reverse polish notation. For example to get the  result  of
       `5+6', you should write `5 6 +', or to get the average of two images, you should write `a.fits b.fits + 2
       /'  (or  more  simply use the `average' operator with `a.fits b.fits average'). Please see the manual for
       more information.

       Arithmetic recognizes a large collection of standard operators, including basic arithmetic (e.g.,  +,  -,
       x,  /),  mathematical  (e.g., abs, pow, sqrt, log), statistical (minvalue, min, max, average), comparison
       (e.g., lt, le, gt), logical (e.g., and, or, not), the full set of bitwise  operators,  and  numeric  type
       conversion  operators to all known types. Please run the command below for a complete list describing all
       operators (press the `SPACE' keyboard key,  or  arrow  keys,  to  go  down  and  `q'  to  return  to  the
       command-line):

              $ info gnuastro "Arithmetic operators"

       For  more information, please run any of the following commands. In particular the second contains a very
       comprehensive  explanation  of  Arithmetic's  invocation:  expected  input(s),  output(s),  and  a   full
       description of all the options.

       All options and their values:
              $ astarithmetic -P

       Inputs/Outputs and options:
              $ info astarithmetic

       Full section in manual/book:
              $ info Arithmetic

       Full Gnuastro manual/book:
              $ info gnuastro

       If  you  couldn't find your answer in the manual, you can get direct help from experienced Gnuastro users
       and developers. For more information, please run:

              $ info help-gnuastro

       Arithmetic options:

              Input:

       -g, --globalhdu=STR
              Use this HDU for all inputs, ignore `--hdu'.

       -h, --hdu=STR/INT
              Nth call, used for HDU of Nth input FITS.

              Output:

       -D, --dontdelete
              Don't delete output if it exists.

       -K, --keepinputdir
              Keep input directory for automatic output.

       -o, --output=STR
              Output name.

              Operating modes:

       -?, --help
              give this help list

       --cite BibTeX citation for this program.

       --config=STR
              Read configuration file STR immediately.

       --lastconfig
              Do not parse any more configuration files.

       --log  Information about output(s) in a log file.

       --minmapsize=INT
              Minimum bytes in array to not use ram RAM.

       -N, --numthreads=INT
              Number of CPU threads to use.

       --onlyversion=STR
              Only run if the program version is STR.

       -P, --printparams
              Print parameter values to be used and abort.

       -q, --quiet
              Only report errors, remain quiet about steps.

       -S, --setdirconf
              Set default values for this directory and abort.

       --usage
              give a short usage message

       -U, --setusrconf
              Set default values for this user and abort.

       -V, --version
              print program version

       Mandatory or optional arguments to long options are also mandatory  or  optional  for  any  corresponding
       short options.

       GNU Astronomy Utilities home page: http://www.gnu.org/software/gnuastro/

REPORTING BUGS

       Report bugs to bug-gnuastro@gnu.org.

COPYRIGHT

       Copyright © 2015-2017, Free Software Foundation, Inc.  License GPLv3+: GNU General public license version
       3 or later.
       This  is  free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent
       permitted by law.

       Written/developed by Mohammad Akhlaghi

SEE ALSO

       The full documentation for Arithmetic is maintained as a Texinfo manual.   If  the  info  and  Arithmetic
       programs are properly installed at your site, the command

              info Arithmetic

       should give you access to the complete manual.

GNU Astronomy Utilities 0.5                       December 2017                                    ARITHMETIC(1)