EnglishFrenchSpanish

OnWorks favicon

nces - Online in the Cloud

Run nces in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command nces 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


nces - netCDF Ensemble Statistics

SYNTAX


nces [-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]]]
[--dbl|flt] [-F] [-G gpe_dsc] [-g grp[,...]] [-h] [--hdf] [--hdr_pad sz] [-L dfl_lvl] [-l
path] [--msa] [-N] [-n loop] [--no_tmp_fl] [--nsm_sfx grp_sfx] [-O] [-p path] [--ppc
var1[, var2[,...]]= prc]] [-R] [-r] [--ram_all] [-t thr_nbr] [--unn] [-v var[,...]] [-X
box] [-x] [-y op_typ] input-files output-file

DESCRIPTION


nces performs gridpoint averages of variables across an arbitrary number (an ensemble) of
input files, with each file receiving an equal weight in the average. Each variable in
the output-file will be the same size as the same variable in any one of the in the input-
files, and all input-files must be the same size. Whereas ncra only performs averages
over the record dimension (e.g., time), and weights each record in the record dimension
evenly, nces averages entire files, and weights each file evenly. All dimensions,
including the record dimension, are treated identically and preserved in the output-file.

The file is the logical unit of organization for the results of many scientific studies.
Often one wishes to generate a file which is the gridpoint average of many separate files.
This may be to reduce statistical noise by combining the results of a large number of
experiments, or it may simply be a step in a procedure whose goal is to compute anomalies
from a mean state. In any case, when one desires to generate a file whose properties are
the mean of all the input files, then nces is the operator to use. nces assumes
coordinate variable are properties common to all of the experiments and so does not
average them across files. Instead, nces copies the values of the coordinate variables
from the first input file to the output file.

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 the
ensemble average (mean) seasonal cycle. Here the numeric filename suffix denotes the
experiment number (not the month):
nces 85_01.nc 85_02.nc 85_03.nc 85_04.nc 85_05.nc 85.nc
nces 85_0[1-5].nc 85.nc
nces -n 5,2,1 85_01.nc 85.nc
These three commands produce identical answers. The output file, 85.nc, is the same size
as the inputs files. It contains 12 months of data (which might or might not be stored in
the record dimension, depending on the input files), but each value in the output file is
the average of the five values in the input files.

In the previous example, the user could have obtained the ensemble average values in a
particular spatio-temporal region by adding a hyperslab argument to the command, e.g.,
nces -d time,0,2 -d lat,-23.5,23.5 85_??.nc 85.nc
In this case the output file would contain only three slices of data in the time
dimension. These three slices are the average of the first three slices from the input
files. Additionally, only data inside the tropics is included.

Use nces online using onworks.net services


Free Servers & Workstations

Download Windows & Linux apps

  • 1
    strace
    strace
    The strace project has been moved to
    https://strace.io. strace is a
    diagnostic, debugging and instructional
    userspace tracer for Linux. It is used
    to monitor a...
    Download strace
  • 2
    gMKVExtractGUI
    gMKVExtractGUI
    A GUI for mkvextract utility (part of
    MKVToolNix) which incorporates most (if
    not all) functionality of mkvextract and
    mkvinfo utilities. Written in C#NET 4.0,...
    Download gMKVExtractGUI
  • 3
    JasperReports Library
    JasperReports Library
    JasperReports Library is the
    world's most popular open source
    business intelligence and reporting
    engine. It is entirely written in Java
    and it is able to ...
    Download JasperReports Library
  • 4
    Frappe Books
    Frappe Books
    Frappe Books is a free and open source
    desktop book-keeping software that's
    simple and well-designed to be used by
    small businesses and freelancers. It'...
    Download Frappe Books
  • 5
    Numerical Python
    Numerical Python
    NEWS: NumPy 1.11.2 is the last release
    that will be made on sourceforge. Wheels
    for Windows, Mac, and Linux as well as
    archived source distributions can be fou...
    Download Numerical Python
  • 6
    CMU Sphinx
    CMU Sphinx
    CMUSphinx is a speaker-independent large
    vocabulary continuous speech recognizer
    released under BSD style license. It is
    also a collection of open source tools ...
    Download CMU Sphinx
  • More »

Linux commands

crm
crm
Use crm online using onworks.net
services. ...
Run crm
  • 4
    crmgr
    crmgr
    crmgr - administration utility for QDBM
    Curia ...
    Run crmgr
  • 5
    gappletviewer
    gappletviewer
    gappletviewer - Load and runs an applet
    ...
    Run gappletviewer
  • 6
    gaps
    gaps
    mummer - package for sequence alignment
    of multiple genomes ...
    Run gaps
  • s-processed="true">
    g15stats
    g15stats - A CPU/Memory/Swap usage
    meter for G15Daemon DESCRIPTION: The
    packages provides the following usage
    meter for LCD on some Logitech
    keyboards, usind g...
    Run g15stats
  • More »
  • Ad