--- name: "nco" section: "1" platform: "linux" package: "nco" version: "5.3.3-1" release: "Debian 13 (Trixie)" platforms: ["linux"] url: "https://new.carta.tech/nco" --- # nco(1) netCDF Operators ## NAME NCO - netCDF Operators ## SYNTAX operator \[ *options*\] *input-files* *output-file* ## DESCRIPTION The netCDF Operators, or **NCO** are a suite of programs known as *operators*. Each operator is a standalone, command line program which is executed at the UNIX shell-level like, e.g., **ls** or **mkdir**. The operators take netCDF (\) files as input, then perform a set of operations (e.g., deriving new data, averaging, hyperslabbing, or metadata manipulation) and produce a netCDF file as output. The operators are primarily designed to aid manipulation and analysis of gridded scientific data. The single command style of **NCO** allows users to manipulate and analyze files interactively and with simple scripts, avoiding the overhead (and some of the power) of a higher level programming environment. The **NCO Users Guide** illustrates their use with examples from the field of climate modeling and analysis. The available *operators* are: **ncap2**, netCDF Arithmetic Processor **ncatted**, netCDF Attribute Editor **ncbo**, netCDF Binary Operator (includes **ncadd**, **ncsubtract**, **ncmultiply**, **ncdivide**) **nces**, netCDF Ensemble Averager **ncecat**, netCDF Ensemble Concatenator **ncflint**, netCDF File Interpolator **ncks**, netCDF Kitchen Sink **ncpdq**, netCDF Permute Dimensions Quickly, Pack Data Quietly **ncra**, netCDF Record Averager **ncrcat**, netCDF Record Concatenator **ncrename**, netCDF Renamer **ncwa**, netCDF Weighted Averager. (Note that the "averagers" are misnamed because they perform many non-linear operations as well, e.g., total, minimum, maximum, RMS). The operators are as general as netCDF itself: there are no restrictions on the contents of the netCDF file(s) used as input. **NCO**'s internal routines are completely dynamic and impose no limit on the number or sizes of dimensions, variables, and files. **NCO** is designed to be used both interactively and with large batch jobs. The default operator behavior is often sufficient for everyday needs, and there are numerous command line (i.e., run-time) options, for special cases. **NCO** works well on all modern operating systems. ## AUTHOR **NCO** manual pages written by Charlie Zender and originally formatted by Brian Mays. ## REPORTING BUGS Report bugs to \. ## COPYRIGHT Copyright © 1995-present 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 \, \, and \, respectively. HTML and XML versions are available at \ and \, 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. [**ncap2**(1)](/ncap2/1.md), [**ncatted**(1)](/ncatted/1.md), [**ncbo**(1)](/ncbo/1.md), [**ncclimo**(1)](/ncclimo/1.md), [**nces**(1)](/nces/1.md), [**ncecat**(1)](/ncecat/1.md), [**ncflint**(1)](/ncflint/1.md), [**ncz2psx**(1)](/ncz2psx/1.md), [**ncks**(1)](/ncks/1.md), [**nco**(1)](/nco/1.md), [**ncpdq**(1)](/ncpdq/1.md), [**ncra**(1)](/ncra/1.md), [**ncrcat**(1)](/ncrcat/1.md), [**ncremap**(1)](/ncremap/1.md), [**ncrename**(1)](/ncrename/1.md), [**ncwa**(1)](/ncwa/1.md) ## HOMEPAGE The **NCO** homepage at \ contains more information.