table of contents
ARITHMETIC(1) | User Commands | ARITHMETIC(1) |
NAME¶
Arithmetic - arithmetic operations on images and numbersSYNOPSIS¶
astarithmetic [OPTION...] ASTRdata or number [ASTRdata] OPERATOR ...DESCRIPTION¶
Arithmetic is part of GNU Astronomy Utilities 0.2.33-8a3b. 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 image are expected as options (starting with `hdu') listed below. Please note that 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 a.fits b.fits average). Please see the manual for more information.The operators/functions recognized by Arithmetic are: +, -, *, /, abs, pow, sqrt, log, log10, minvalue, maxvalue, min, max, average, median, lt, le, gt, ge, eq, neq, and, or, not, isblank. Please run `info gnuastro "Arithmetic operators"' for detailed information on each operator. Note that multiplication should be quoted (like "*", or '*') to avoid shell expansion.
For more information, please run any of the following commands. They will respectively show you the `Invoking Arithmetic' subsection, the complete `Arithmetic' section, or the full GNU Astronomy Utilities manual. In particular the first contains a very complete explanation of each option.
- info astarithmetic
- info Arithmetic
- 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:
- -h, --hdu=STR
- Nth call of this option, used for Nth input FITS.
- -H, --mhdu=STR
- Mask image header name.
- -M, --mask=STR
- Mask image file name.
- Output:
- -D, --dontdelete
- Don't delete output if it exists.
- -K, --keepinputdir
- Do not remove input's dir info for output.
- -o, --output=STR
- Output file or directory name.
- -T, --type=STR
- byte, short, long, longlong, float, double.
- Operating modes:
- -?, --help
- give this help list
- --cite
- BibTeX citation for Arithmetic.
- --nolog
- No log file for programs which make one.
- -N, --numthreads=INT
- Number of CPU threads to use.
- --onlydirconf
- Only read current directory configuration file.
- --onlyversion=STR
- Only run if the program version is this.
- -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/
AUTHOR¶
Written by Mohammad AkhlaghiREPORTING BUGS¶
Report bugs to bug-gnuastro@gnu.org.COPYRIGHT¶
Copyright © 2015-2016, 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.
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.
October 2016 | GNU Astronomy Utilities 0.2.33-8a3b |