FCNClassifier

class FCNClassifier(n_epochs=2000, batch_size=16, callbacks=None, verbose=False, loss='categorical_crossentropy', metrics=None, random_state=None, activation='sigmoid', activation_hidden='relu', use_bias=True, optimizer=None, filter_sizes=(128, 256, 128), kernel_sizes=(8, 5, 3))[source]

Fully Convolutional Network (FCN), as described in [1].

Adapted from the implementation from Fawaz et. al https://github.com/hfawaz/dl-4-tsc/blob/master/classifiers/fcn.py

Parameters:

n_epochsint, default = 2000: the number of epochs to train the model
batch_sizeint, default = 16: the number of samples per gradient update.
callbackslist of keras.callbacks.Callback, optional (default=None): List of Keras callbacks to apply during model training.
random_stateint or None, default=None: Seed for random number generation.
verboseboolean, default = False: whether to output extra information
lossstring, default=”mean_squared_error”: fit parameter for the keras model
optimizerkeras.optimizer, default=keras.optimizers.Adam(),
metricslist of strings, default=[“accuracy”],
activationstring or a tf callable, default=”sigmoid”: Activation function used in the output layer. List of available activation functions: https://keras.io/api/layers/activations/
activation_hiddenstring or a tf callable, default=”relu”: Activation function used in the hidden layers. List of available activation functions: https://keras.io/api/layers/activations/
use_biasboolean, default = True: whether the layer uses a bias vector.
optimizerkeras.optimizers object, default = Adam(lr=0.01): specify the optimizer and the learning rate to be used.
filter_sizeslist or tuple of int , default = (128,256,128): number of filters for each convolutional layer. must have length equal to kernel_sizes.
kernel_sizeslist or tuple of int , default = (8,5,3): kernel size for each convolutional layer. must have length equal to filter_sizes.

Attributes:

is_fitted: Whether fit has been called.

References

[1]

Wang et al, Time series classification from scratch with

deep neural networks: A strong baseline. 2017 International Joint Conference on Neural Networks (IJCNN)

Examples

>>> from sktime.classification.deep_learning.fcn import FCNClassifier
>>> from sktime.datasets import load_unit_test
>>> X_train, y_train = load_unit_test(split="train", return_X_y=True)
>>> X_test, y_test = load_unit_test(split="test", return_X_y=True)
>>> fcn = FCNClassifier(n_epochs=20,batch_size=4)
>>> fcn.fit(X_train, y_train)
FCNClassifier(...)

Methods

`build_model`(input_shape, n_classes, **kwargs)	Construct a compiled, un-trained, keras model that is ready for training.
`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 time series classifier to training data.
`fit_predict`(X, y[, cv, change_state])	Fit and predict labels for sequences in X.
`fit_predict_proba`(X, y[, cv, change_state])	Fit and predict labels probabilities for sequences in X.
`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.
`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.
`predict`(X)	Predicts labels for sequences in X.
`predict_proba`(X)	Predicts labels probabilities for sequences in X.
`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.
`score`(X, y)	Scores predicted labels against ground truth labels on X.
`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.
`summary`()	Summary function to return the losses/metrics for model fit.