Bollinger

Bollinger

class Bollinger(window, k=1, memory='all')[source]

Apply Bollinger bands to a time series.

The transformation works for univariate and multivariate timeseries.

Parameters:

windowint

The window over which to compute the moving average and the standard deviation.

k: float, default = 1

Multiplier to determine how many stds the upper and lower bounds are from the moving average.

memorystr, optional, default = “all”

how much of previously seen X to remember, for exact reconstruction of inverse.

• “all” : estimator remembers all X, inverse is correct for all indices seen

• “latest” : estimator only remembers latest X necessary for future

reconstruction. Inverses at any time stamps after fit are correct, but not past time stamps.

• “none” : estimator does not remember any X, inverse is direct cumsum

Attributes:

is_fitted

Whether fit has been called.

Examples

>>> from sktime.transformations.bollinger import Bollinger
>>> from sktime.datasets import load_airline
>>> y = load_airline()
>>> transformer = Bollinger(window=12, k=1)
>>> y_transform = transformer.fit_transform(y)

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 transformer with X, optionally y.