Provided by: nco_4.5.4-1build1_amd64 
NAME
ncap2 - netCDF Arithmetic Processor, Next Generation
SYNTAX
ncap2 [-3] [-4] [-6] [-7] [-A] [--bfr sz][-C][-c][-D dbg_lvl] [-d dim,[ min][,[ max]]] [-F] [-f] [--glb
att_name= att_val]] [-h] [--hdf] [--hdr_pad sz] [-l path] [--no_tmp_fl] [-O] [-o output-file] [-p path]
[-R] [-r] [--ram_all] [-S script-file][-s script][-t thr_nbr][-v var[,...]] input-file [ output-file ]
DESCRIPTION
ncap2 supercedes and is backwards-compatible with ncap which is now deprecated. Both operators
arithmetically process netCDF files. The primary ncap2 documentation is currently the sample script
<http://nco.sf.net/ncap2.in> The remainder of this manpage is identical to the ncap manpage.
The processing instructions are contained either in the NCO script file fl.nco or in a sequence of
command line arguments. The options -s (or long options --spt or --script) are used for in-line scripts
and -S (or long options --fl_spt or --script-file) are used to provide the filename where (usually
multiple) scripting commands are pre-stored. ncap2 was written to perform arbitrary albebraic
transformations of data and archive the results as easily as possible. Missing values are treated
correctly. The results of the algebraic manipulations are called derived fields.
Unlike the other operators, ncap2 does not accept a list of variables to be operated on as an argument to
-v. Rather, the -v switch takes no arguments and indicates that ncap2 should output only user-defined
variables. ncap2 does not accept or understand the -x switch.
EXAMPLES
Compute the square of variable T
ncap2 -s "T2=T*T" in.nc out.nc
AUTHOR
NCO manual pages written by Charlie Zender and originally formatted by Brian Mays.
REPORTING BUGS
Report bugs to <http://sf.net/bugs/?group_id=3331>.
COPYRIGHT
Copyright © 1995-2016 Charlie Zender
This is free software; see the source for copying conditions. There is NO warranty; not even for
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
SEE ALSO
The full documentation for NCO is maintained as a Texinfo manual called the NCO User's Guide. Because
NCO is mathematical in nature, the documentation includes TeX-intensive portions not viewable on
character-based displays. Hence the only complete and authoritative versions of the NCO User's Guide are
the PDF (recommended), DVI, and Postscript versions at <http://nco.sf.net/nco.pdf>,
<http://nco.sf.net/nco.dvi>, and <http://nco.sf.net/nco.ps>, respectively. HTML and XML versions are
available at <http://nco.sf.net/nco.html> and <http://nco.sf.net/nco.xml>, respectively.
If the info and NCO programs are properly installed at your site, the command
info nco
should give you access to the complete manual, except for the TeX-intensive portions.
HOMEPAGE
The NCO homepage at <http://nco.sf.net> contains more information. NCAP2(1)