Version 4.2.4 of the netCDF Operators (NCO) has been released. NCO is an Open Source package that consists of a dozen standalone, command-line programs that take netCDF files as input, then operate (e.g., derive new data, average, print, hyperslab, manipulate metadata) and output the results to screen or files in text, binary, or netCDF formats.
The NCO project is coordinated by Professor Charlie Zender of the Department of Earth System Science, University of California, Irvine. More information about the project, along with binary and source downloads, are available on the SourceForge project page.
From the release message:
This release continues, and largely concludes, the introduction of powerful new sub-setting features aimed to give users powerful and fine-grained control over subsetting hierarchical netCDF4 files. Last release saw the introduction of Group Path Editing (GPE) which controls the output location of extracted variables and groups. This release introduces three new features that control extraction:
- Group regular expressions
- Anchoring and Recursion
- Intersection and Unions
These latest three features are only in
ncks and ncecat for the time-being.
Again, let us know how you like or dislike the way we have implemented
the netCDF4 group functionality in ncks and ncecat.
There are many choices for handling (selecting, printing, moving,
comparing) groups and we made what I would call tentative decisions.
Your feedback will help us finalize details like the printed output
format for group information and the syntax of switches.
This improved netCDF4 support will eventually come to all of NCO.
