Man pages sections > man1 > aststatistics

Statistics - calculate statistics of a dataset

STATISTICS(1) User Commands STATISTICS(1)

NAME

Statistics - calculate statistics of a dataset

SYNOPSIS

aststatistics [ OPTION...] ASTRdata

DESCRIPTION

Statistics is part of GNU Astronomy Utilities 0.4. Statistics will do statistical analysis on the input dataset (table column or image). All blank pixels or pixels outside of the given range are ignored. You can either directly ask for certain statistics in one line/row as shown below with the same order as requested, or get tables of different statistical measures like the histogram, cumulative frequency style and etc. If no particular statistic is requested, some basic information about the dataset is printed on the command-line.
For more information, please run any of the following commands. In particular the second contains a very comprehensive explanation of Statistics's invocation: expected input(s), output(s), and a full description of all the options.
All options and their values:
$ aststatistics -P
Inputs/Outputs and options:
$ info aststatistics
Full section in manual/book:
$ info Statistics
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
Statistics options:
Input:
-c, --column=STR
Column name or number if input is a table.
-g, --greaterequal=FLT
Only use values greater-equal than this.
-h, --hdu=STR/INT
Extension name or number of input data.
-I, --ignorecase
Ignore case in matching/searching columns.
-l, --lessthan=FLT
Only use values less than this.
-Q, --qrange=FLT[,FLT]
Quantile range: one (from Q to 1-Q) or two.
-r, --refcol=STR
Reference column name or number.
--searchin=STR
Select column(s) in: `name', `unit', `comment'.
Tessellation (tile grid):
--checktiles
Tile IDs in an image, the size of input.
-F, --remainderfrac=FLT
Fraction of remainder to split last tile.
-i, --interpolate
Interpolate over blank tiles to fill them.
--interpnumngb=INT
No. of neighbors to use for interpolation.
--interponlyblank
Only interpolate over the blank tiles.
-M, --numchannels=INT[,..] No. of channels in dim.s (FITS order).
--oneelempertile
Only display 1 element/tile, not full input res.
--workoverch
Work (not tile) over channel edges.
-Z, --tilesize=INT[,INT]
Regular tile size on dim.s (FITS order).
Output:
-D, --dontdelete
Don't delete output if it exists.
-K, --keepinputdir
Keep input directory for automatic output.
-o, --output=STR
Output name.
--tableformat=STR
Table format: `fits-ascii', `fits-binary'.
Single value measurements
-d, --std
Standad deviation.
-E, --median
Median.
--maximum
Maximum.
--minimum
Minimum.
-m, --mean
Mean.
--modequant
Mode quantile (see --mode)
--modesym
Mode symmetricity (see --mode).
--modesymvalue
Value at mode symmetricity (see --mode).
--number
Number (non-blank).
-O, --mode
Mode (Appendix C of arXiv:1505.01664).
--quantfunc=FLT[,...]
Quantile function (multiple values acceptable).
--sum
Sum.
-u, --quantile=FLT[,...]
Quantile (multiple values acceptable).
Particular calculation
--asciicfp
Print an ASCII cumulative frequency plot.
-A, --asciihist
Print an ASCII histogram.
-C, --cumulative
Save the cumulative frequency plot in output.
-H, --histogram
Save the histogram in output.
--mirror=FLT
Save the histogram and CFP of the mirror dist.
-s, --sigmaclip
Overall sigma-clipping (see `--sclipparams')
-t, --ontile
Single values on separate tiles, not full input.
-y, --sky
Find the Sky and its STD over the tessellation.
Sky and Sky STD settings
--checksky
Store steps in `_sky_steps.fits' file.
-k, --kernel=STR
File name of kernel to convolve input.
--khdu=STR
HDU/extension name or number of kernel.
--mirrordist=FLT
Max. distance (error multip.) to find mode.
--modmedqdiff=FLT
Max. mode and median quantile diff. per tile.
--sclipparams=FLT,FLT
Sigma clip: Multiple, and tolerance/number.
--smoothwidth=INT
Sky: flat kernel width to smooth interpolated.
Histogram and CFP settings
--asciiheight=INT
Height of ASCII histogram or CFP plots.
--maxbinone
Scale such that the maximum bin has value of one.
--numasciibins=INT
No. of bins in ASCII histogram or CFP plots.
--numbins=INT
No. of bins in histogram or CFP tables.
-n, --normalize
Set sum of all bins to 1.
--onebinstart=FLT
Shift bins so one bin starts on this value.
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.
--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 © 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 Statistics is maintained as a Texinfo manual. If the info and Statistics programs are properly installed at your site, the command
info Statistics
should give you access to the complete manual.
September 2017 GNU Astronomy Utilities 0.4