cf functions¶

Version 3.4.0 for version 1.8 of the CF conventions.

Reading and writing¶

`cf.read`	Read field constructs from netCDF, CDL, PP or UM fields files.
`cf.write`	Write field constructs to a netCDF file.
`cf.load_stash2standard_name`	Load a STASH to standard name conversion table.

Aggregate field constructs into as few field constructs as possible.

`cf.ATOL`	The tolerance on absolute differences when testing for numerically tolerant equality.
`cf.RTOL`	The tolerance on relative differences when testing for numerically tolerant equality.
`cf.default_netCDF_fillvals`	Default data array fill values for each data type.
`cf.histogram`	Return the distribution of a set of variables in the form of an N-dimensional histogram.
`cf.relative_vorticity`	Calculate the relative vorticity using centred finite differences.

General conditions

`cf.eq`	A `Query` object for an “equal” condition.
`cf.ge`	A `Query` object for a “greater than or equal” condition.
`cf.gt`	A `Query` object for a “strictly greater than” condition.
`cf.le`	A `Query` object for a “less than or equal” condition.
`cf.lt`	A `Query` object for a “strictly less than” condition.
`cf.ne`	A `Query` object for a “not equal” condition.
`cf.wi`	A `Query` object for a “within a range” condition.
`cf.wo`	A `Query` object for a “without a range” condition.
`cf.set`	A `Query` object for a “member of set” condition.

Date-time conditions

`cf.year`	A `Query` object for a “year” condition.
`cf.month`	A `Query` object for a “month of the year” condition.
`cf.day`	A `Query` object for a “day of the month” condition.
`cf.hour`	A `Query` object for a “hour of the day” condition.
`cf.minute`	A `Query` object for a “minute of the hour” condition.
`cf.second`	A `Query` object for a “second of the minute” condition.
`cf.jja`	A `Query` object for a “month of year in June, July or August” condition.
`cf.son`	A `Query` object for a “month of year in September, October, November” condition.
`cf.djf`	A `Query` object for a “month of year in December, January, February” condition.
`cf.mam`	A `Query` object for a “month of year in March, April, May” condition.
`cf.seasons`	A customizable list of `Query` objects for “seasons in a year” conditions.

Coordinate cell conditions

`cf.contains`	A `Query` object for a “cell contains” condition.
`cf.cellsize`	A `Query` object for a “cell size” condition.
`cf.cellgt`	A `Query` object for a “cell bounds strictly greater than” condition.
`cf.cellge`	A `Query` object for a “cell bounds greater than or equal” condition.
`cf.cellle`	A `Query` object for a “cell bounds less than or equal” condition.
`cf.celllt`	A `Query` object for a “cell bounds strictly less than” condition.
`cf.cellwi`	A `Query` object for a “cell bounds lie within range” condition.
`cf.cellwo`	A `Query` object for a “cell bounds lie without range” condition.

`cf.dt`	Return a date-time object for a date and time according to a calendar.
`cf.dt_vector`	Return a scalar or 1-d array of date-time objects.
`cf.Y`	Return a time duration of calendar years in a `cf.TimeDuration` object.
`cf.M`	Return a time duration of calendar months in a `cf.TimeDuration` object.
`cf.D`	Return a time duration of days in a `cf.TimeDuration` object.
`cf.h`	Return a time duration of hours in a `cf.TimeDuration` object.
`cf.m`	Return a time duration of minutes in a `cf.TimeDuration` object.
`cf.s`	Return a time duration of seconds in a `cf.TimeDuration` object.

`cf.CHUNKSIZE`	Set the chunksize used by LAMA for partitioning the data array.
`cf.COLLAPSE_PARALLEL_MODE`	Which mode to use when collapse is run in parallel.
`cf.FREE_MEMORY`	The available physical memory.
`cf.FREE_MEMORY_FACTOR`	Set the fraction of memory kept free as a temporary workspace.
`cf.FM_THRESHOLD`	The amount of memory which is kept free as a temporary work space.
`cf.MINNCFM`
`cf.OF_FRACTION`	The amount of concurrently open files above which files containing data arrays may be automatically closed.
`cf.REGRID_LOGGING`	Whether or not to enable ESMPy logging.
`cf.SET_PERFORMANCE`	Tune performance of parallelisation by setting chunksize and free memory factor.
`cf.TEMPDIR`	The directory for internally generated temporary files.
`cf.TOTAL_MEMORY`	TODO
`cf.close_files`	Close open files containing sub-arrays of data arrays.
`cf.close_one_file`	Close an arbitrary open file containing a sub-array of a data array.
`cf.open_files`	Return the open files containing sub-arrays of master data arrays.
`cf.open_files_threshold_exceeded`	Return True if the total number of open files is greater than the current threshold.

`cf.CF`	The version of the CF conventions.
`cf.RELAXED_IDENTITIES`	Use ‘relaxed’ mode when getting a construct identity.
`cf.abspath`	Return a normalized absolute version of a file name.
`cf.dirname`	Return the directory name of a file.
`cf.dump`	Print a description of an object.
`cf.environment`	Return the names and versions of the cf package and its dependencies.
`cf.example_field`	Return an example field construct.
`cf.flat`	Return an iterator over an arbitrarily nested sequence.
`cf.hash_array`	Return the hash value of a numpy array.
`cf.implementation`	Return a container for the CF data model implementation.
`cf.inspect`	Inspect the attributes of an object.
`cf.pathjoin`	Join two file path components intelligently.
`cf.pickle`
`cf.relpath`	Return a relative filepath to a file.
`cf.unpickle`