CDO

• Wrong results with the following statistical functions: * mean, *avg, *sum, *var, *std
  only if all of the following conditions are complied:
  - x86_64 machine (tornado, squall, thunder, lizard)
  - dataset has no missing values
  - the horizontal grid size is > 1 and not multiple of 8
  This bug was introduced in CDO version 1.5.6.

• Runstat: OpenMP parallelization over parameter nts
• import_binary: added support for 64-bit floats via extra OPTION keyword flt64

• Arith: added support for 3D masks
• mastrfu: use grid coordinates from input file

• ymonsub: added support for time bounds
• Wrong netCDF output for unscaled uint8, int8, int16, int32 variables [Bug #2516]

In order to make the latest features available to users, a new release will be offered: cdo-current.

• There will be no support or maintenance for this release. We try to keep it stable, but it will not be tested like the official one.
• cdo-current will be released for new features or bug-fixes but not every night.
• It is a source-only release, pre-compiled binaries will not be offered.

Tar balls can be downloaded as usual from the download page

• yhouradd, yhoursub, yhourmul, yhourdiv: Multi-year hourly arithmetic

• ECA operators: wrong result if missing value is not the default missing value (-9e33)
• ml2pl: added support for GRIB2 parameter names
• replace: removed debug output

Changed from old pycdf to more recent scipy.io.netcdf for returning numpy arrays (suggested by Alastair McKinstry).

See cdo.{rb,py}

Both versions now work with the win32 version of CDO and interfaces have converged a bit more.

See cdo.{rb,py} for installation instructions.

Updated libraries:

• netcdf-4.2
• hdf5-1.8.8
• grib_api-1.9.16
• proj4-4.8.0

The default unix installation now includes grib_api.

• setgridtype: added parameter lonlat to convert curvilinear to regular lon/lat grids
• remapcon: added env REMAP_AREA_MIN, to set the minimum area fraction

• timcovar: covariance over time
• fldcovar: covariance in grid space

• splitsel: added support for constant fields [Bug #1701]
• combination of selection commands (e.g. selmon -selyear) do not terminate, if no result found [Bug #1640]

The scripting language bindings for Ruby have been enlarged to Python! Please have a look at cdo.{rb,py} for installation instructions and some examples.

For reading all unit tests, please register yourself and have a look at source:trunk/cdo/contrib/python/test/test_cdo.py for Python and source:trunk/cdo/contrib/ruby/test/test_cdo.rb for Ruby.

This is the first release of cdo.rb, a Ruby module to call CDO.

Installation¶

cdo.rb is released as a ruby gem, Ruby's own package format. Install cdo.rb with

gem install cdo

Documentation¶

Please have a look at the automatic documentation from rubygem: http://rubydoc.info/gems/cdo/frames

Examples¶

CDO's operators are implemented as module methods:

Cdo.info(:in => "input.nc")

Input and output stream arguments are handled special with hash keys :in and :out. Same is true for the other options of CDO like "-f" or "-P":

Cdo.topo(:out => "topography.grb")
Cdo.copy(:in => "topography.grb",:out => "topography.nc4",:options => "-f nc4")

Operator options can be set as standard method arguments:

Cdo.stdatm(0,10,20,50,100,200,500,1000,:out => "standard_atm.nc",:options => "-f nc")

More example can be found in the unit tests: source:trunk/cdo/contrib/ruby/test/test_cdo.rb.