NAME

       Arithmetic - arithmetic operations on images and numbers

SYNOPSIS

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

DESCRIPTION

       Arithmetic  is  part of GNU Astronomy Utilities 0.11.  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.

       -w, --wcsfile=STR
              File to use for output's WCS.

       -W, --wcshdu=STR
              HDU/extension to use for output's WCS.

              Output:

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

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

       -o, --output=STR
              Output file name.

       -O, --onedasimage
              Write 1D outputs as an image, not a table.

       -s, --onedonstdout
              Write 1D output on stdout, not in a table.

       --tableformat=STR
              Table fmt: `fits-ascii', `fits-binary', `txt'.

              Operating modes:

       -?, --help
              give this help list

       --checkconfig
              List all config files and variables read.

       --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.

       --quietmmap
              Don't print mmap'd file's name and size.

       -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 © 2015-2019, 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.