This is the command ncecat that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
ncecat - netCDF Ensemble Concatenator
SYNTAX
ncecat [-3] [-4] [-6] [-7] [-A] [--bfr sz][-C][-c][--cnk_byt sz][--cnk_dmn nm,sz]
[--cnk_map map] [--cnk_min sz] [--cnk_plc plc] [--cnk_scl sz][-D dbg_lvl] [-d dim,[
min][,[ max]]] [-F] [-G gpe_dsc] [-g grp[,...]] [--gag] [--glb att_name= att_val]] [-h]
[--hdr_pad sz] [-L dfl_lvl] [-l path] [-M] [--mrd] [--msa] [-n loop] [--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).
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