ColumnwiseTransformer

ColumnwiseTransformer

class ColumnwiseTransformer(transformer, columns=None)[source]

Apply a transformer columnwise to multivariate series.

Overview: input multivariate time series and the transformer passed in transformer parameter is applied to specified columns, each column is handled as a univariate series. The resulting transformed data has the same shape as input data.

Parameters:

transformerEstimator

scikit-learn-like or sktime-like transformer to fit and apply to series.

columnslist of str or None

Names of columns that are supposed to be transformed. If None, all columns are transformed.

Attributes:

transformers_dict of {strtransformer}

Maps columns to transformers.

columns_list of str

Names of columns that are supposed to be transformed.

See also

OptionalPassthrough

Examples

>>> from sktime.datasets import load_longley
>>> from sktime.transformations.detrend import Detrender
>>> from sktime.transformations.compose import ColumnwiseTransformer
>>> _, X = load_longley()
>>> transformer = ColumnwiseTransformer(Detrender())
>>> Xt = transformer.fit_transform(X)

Methods

check_is_fitted([method_name])	Check if the estimator has been fitted.
clone()	Obtain a clone of the object with same hyper-parameters and config.
clone_tags(estimator[, tag_names])	Clone tags from another object as dynamic override.
create_test_instance([parameter_set])	Construct an instance of the class, using first test parameter set.
create_test_instances_and_names([parameter_set])	Create list of all test instances and a list of names for them.
fit(X[, y])	Fit transformer to X, optionally to y.
fit_transform(X[, y])	Fit to data, then transform it.
get_class_tag(tag_name[, tag_value_default])	Get class tag value from class, with tag level inheritance from parents.
get_class_tags()	Get class tags from class, with tag level inheritance from parent classes.
get_config()	Get config flags for self.
get_fitted_params([deep])	Get fitted parameters.
get_param_defaults()	Get object's parameter defaults.
get_param_names([sort])	Get object's parameter names.
get_params([deep])	Get a dict of parameters values for this object.
get_tag(tag_name[, tag_value_default, ...])	Get tag value from instance, with tag level inheritance and overrides.
get_tags()	Get tags from instance, with tag level inheritance and overrides.
get_test_params([parameter_set])	Return testing parameter settings for the estimator.
inverse_transform(X[, y])	Inverse transform X and return an inverse transformed version.
is_composite()	Check if the object is composed of other BaseObjects.
load_from_path(serial)	Load object from file location.
load_from_serial(serial)	Load object from serialized memory container.
reset()	Reset the object to a clean post-init state.
save([path, serialization_format])	Save serialized self to bytes-like object or to (.zip) file.
set_config(**config_dict)	Set config flags to given values.
set_params(**params)	Set the parameters of this object.
set_random_state([random_state, deep, ...])	Set random_state pseudo-random seed parameters for self.
set_tags(**tag_dict)	Set instance level tag overrides to given values.
transform(X[, y])	Transform X and return a transformed version.
update(X[, y, update_params])	Update parameters.