# cfdm.core.CellMethod¶

class cfdm.core.CellMethod(axes=None, method=None, qualifiers=None, source=None, copy=True)[source]

Bases: cfdm.core.abstract.container.Container

A cell method construct of the CF data model.

One or more cell method constructs describe how the cell values of the field construct represent the variation of the physical quantity within its cells, i.e. the structure of the data at a higher resolution.

A single cell method construct consists of a set of axes, a “method” property which describes how a value of the field construct’s data array describes the variation of the quantity within a cell over those axes (e.g. a value might represent the cell area average), and descriptive qualifiers serving to indicate more precisely how the method was applied (e.g. recording the spacing of the original data, or the fact that the method was applied only over El Nino years).

New in version (cfdm): 1.7.0

Initialisation

Parameters
axes: (sequence of) str, optional

Set the axes of the cell method construct, specified either by the construct identifiers of domain axis constructs, standard names, or the special string 'area'.

The axes may also be set after initialisation with the set_axes method.

Parameter example:

axes='domainaxis0'

Parameter example:

axes=['domainaxis0']

Parameter example:

axes=('domainaxis0', 'domainaxis1')

Parameter example:

axes='area'

Parameter example:

axes=['domainaxis2', 'time']

method: str, optional

Set the axes of the cell method construct. Either one or more domain axis construct identifiers or standard names. Ignored if the source parameter is set.

The method may also be set after initialisation with the set_method method.

Parameter example:

method='mean'

qualifiers: dict, optional

Set descriptive qualifiers. The dictionary keys are qualifier names, with corresponding values. Ignored if the source parameter is set.

Qualifiers may also be set after initialisation with the qualifiers and set_qualifier methods.

Parameter example:

qualifiers={'comment': 'sampled instantaneously'}

Parameter example:

qualifiers={'where': 'sea', ''over': 'ice'}

source: optional

Initialise the axes, method and qualifiers from those of source.

Note that if source is a CellMethod instance then cfdm.core.CellMethod(source=source) is equivalent to source.copy().

copy: bool, optional

If False then do not deep copy input parameters prior to initialisation. By default arguments are deep copied.

## Inspection¶

Attributes

 construct_type Return a description of the construct type.

## Properties¶

Methods

 del_axes Remove the axes of the cell method. get_axes Return the axes of the cell method. has_axes Whether the axes of the cell method have been set. set_axes Set the axes of the cell method. del_method Remove the method of the cell method. get_method Return the method of the cell method. has_method Whether the method of the cell method has been set. set_method Set the method of the cell method. del_qualifier Remove a qualifier of the cell method. get_qualifier Return a qualifier of the cell method. has_qualifier Whether a qualifier of the cell method has been set. set_qualifier Set a qualifier of the cell method. qualifiers Return all qualifiers of the cell method.

## Miscellaneous¶

Methods

 copy Return a deep copy.

## Special¶

Methods

 __deepcopy__ Called by the copy.deepcopy function.

## Docstring substitutions¶

Methods

 _docstring_special_substitutions Return the special docstring substitutions. _docstring_substitutions Returns the substitutions that apply to methods of the class. _docstring_package_depth Returns the class {{package}} substitutions package depth. _docstring_method_exclusions Returns method names excluded in the class substitutions.