Provided by: nco_4.7.2-1_amd64 
NAME
ncecat - netCDF Ensemble Concatenator
SYNTAX
ncecat [-3] [-4] [-5] [-6] [-7] [-A] [--bfr sz_byt][-C][-c][--cnk_byt sz_byt][--cnk_csh sz_byt][--cnk_dmn
nm,sz_lmn] [--cnk_map map] [--cnk_min sz_byt] [--cnk_plc plc] [--cnk_scl sz_lmn][-D dbg_lvl] [-d dim,[
min][,[ max]]] [-F] [--fl_fmt=fmt] [-G gpe_dsc] [-g grp[,...]] [--gag] [--glb att_name= att_val]] [-h]
[--hdr_pad sz_byt] [-L dfl_lvl] [-l path] [-M] [--mrd] [--msa] [-n loop] [--no_cll_msr] [--no_frm_trm]
[--no_tmp_fl] [-O] [-p path] [--ppc var1[, var2[,...]]= prc]] [-R] [-r] [--ram_all] [-t thr_nbr] [-u
ulm_nm] [--unn] [-v var[,...]] [-X box] [-x] input-files output-file
DESCRIPTION
ncecat concatenates an arbitrary number of input files into a single output file. Input files are glued
together by creating a record dimension in the output file. Input files must be the same size. Each
input file is stored consecutively as a single record in the output file. Each variable (except
coordinate variables) in each input file becomes one record in the same variable in the output file.
Coordinate variables are not concatenated, they are instead simply copied from the first input file to
the output-file. Thus, the size of the output file is the sum of the sizes of the input files.
Consider five realizations, 85a.nc, 85b.nc,... 85e.nc of 1985 predictions from the same climate model.
Then ncecat 85?.nc 85_ens.nc glues the individual realizations together into the single file, 85_ens.nc.
If an input variable was dimensioned [ lat, lon], it will have dimensions [ record, lat, lon] in the
output file. A restriction of ncecat is that the hyperslabs of the processed variables must be the same
from file to file. Normally this means all the input files are the same size, and contain data on
different realizations of the same variables.
EXAMPLES
Consider a model experiment which generated five realizations of one year of data, say 1985. You can
imagine that the experimenter slightly perturbs the initial conditions of the problem before generating
each new solution. Assume each file contains all twelve months (a seasonal cycle) of data and we want to
produce a single file containing all the seasonal cycles. Here the numeric filename suffix denotes the
experiment number (not the month):
ncecat 85_01.nc 85_02.nc 85_03.nc 85_04.nc 85_05.nc 85.nc
ncecat 85_0[1-5].nc 85.nc
ncecat -n 5,2,1 85_01.nc 85.nc
These three commands produce identical answers. The output file, 85.nc, is five times the size as a
single input-file. It contains 60 months of data (which might or might not be stored in the record
dimension, depending on the input files).
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 © 1995-2018 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 Users 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 Users 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.
ncap(1), ncap2(1), ncatted(1), ncbo(1), ncclimo(1), nces(1), ncecat(1), ncflint(1), ncks(1), nco(1),
ncpdq(1), ncra(1), ncrcat(1), ncremap(1), ncrename(1), ncwa(1)
HOMEPAGE
The NCO homepage at <http://nco.sf.net> contains more information. NCECAT(1)