model.cvrbfnn module

RosenPy: An Open Source Python Framework for Complex-Valued Neural Networks. Copyright © A. A. Cruz, K. S. Mayer, D. S. Arantes.

License

This file is part of RosenPy. RosenPy is an open source framework distributed under the terms of the GNU General Public License, as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. For additional information on license terms, please open the Readme.md file.

RosenPy is distributed in the hope that it will be useful to every user, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with RosenPy. If not, see <http://www.gnu.org/licenses/>.

class model.cvrbfnn.CVRBFNN(cost_func=<function mse>, patience=inf, gpu_enable=False)[source]

Bases: NeuralNetwork

Specification for the Complex Valued Radial Basis Function Neural Network. This includes the feedforward, backpropagation, and adding layer methods specifics. This class derives from NeuralNetwork class.

accuracy(y, y_pred)

Computes the accuracy of the predictions.

Parameters:

yarray-like

The true labels or target values.

y_predarray-like

The predicted values.

Returns:

float

The accuracy of the predictions as a percentage.

add_layer(neurons, ishape=0, oshape=0, weights_initializer=<function opt_crbf_weights>, bias_initializer=<function zeros>, sigma_initializer=<function ones_real>, gamma_initializer=<function opt_crbf_gamma>, weights_rate=0.001, biases_rate=0.001, gamma_rate=0.01, sigma_rate=0.01, reg_strength=0.0, lambda_init=0.1, lr_decay_method=<function none_decay>, lr_decay_rate=0.0, lr_decay_steps=1, module=None)[source]

Adds a layer to the neural network.

Parameters:

neuronsint

Number of neurons in the layer.

ishapeint, optional

Input shape for the layer.

oshapeint, optional

Output shape for the layer.

weights_initializerfunction, optional

Function to initialize the weights.

bias_initializerfunction, optional

Function to initialize the biases.

sigma_initializerfunction, optional

Function to initialize sigma values.

gamma_initializerfunction, optional

Function to initialize gamma values.

weights_ratefloat, optional

Learning rate for weights.

biases_ratefloat, optional

Learning rate for biases.

gamma_ratefloat, optional

Learning rate for gamma.

sigma_ratefloat, optional

Learning rate for sigma.

reg_strengthfloat, optional

Regularization strength.

lambda_initfloat, optional

Initial lambda value for regularization.

lr_decay_methodfunction, optional

Learning rate decay method.

lr_decay_ratefloat, optional

Learning rate decay rate.

lr_decay_stepsint, optional

Learning rate decay steps.

modulemodule, optional

Module for computation (e.g., numpy, cupy).

Returns:

None

backprop(y, y_pred, epoch)[source]

Performs the backpropagation operation on the neural network.

Parameters:

yarray-like

The true labels or target values.

y_predarray-like

The predicted values from the neural network.

epochint

The current epoch number.

convert_data(data)

Converts the input data to the appropriate format for the current backend (NUMPY or CUPY).

Parameters:

dataarray-like

The input data.

Returns:

array-like

The converted input data.

denormalize_outputs(normalized_output_data, mean, std_dev)[source]

Denormalize the output data.

Parameters:

normalized_output_dataarray-like

Normalized output data.

meanfloat

Mean value for denormalization.

std_devfloat

Standard deviation for denormalization.

Returns:

array-like

Denormalized output data.

feedforward(input_data)[source]

Performs the feedforward operation on the neural network.

Parameters:

input_dataarray-like

The input data to be fed into the neural network.

Returns:

array-like

The output of the neural network after the feedforward operation.

fit(x_train, y_train, x_val=None, y_val=None, epochs=100, verbose=10, batch_gen=<function batch_sequential>, batch_size=1, optimizer=<model.rp_optimizer.GradientDescent object>)

Trains the neural network on the provided training data.

Parameters:

x_trainarray-like

The input training data.

y_trainarray-like

The target training data.

x_valarray-like, optional

The input validation data. Default is None.

y_valarray-like, optional

The target validation data. Default is None.

epochsint, optional

The number of training epochs. Default is 100.

verboseint, optional

Controls the verbosity of the training process. Default is 10.

batch_genfunction, optional

The batch generation function to use during training. Default is batch_gen_func.batch_sequential.

batch_sizeint, optional

The batch size to use during training. Default is 1.

optimizerOptimizer, optional

The optimizer to use during training. Default is GradientDescent with specified parameters.

get_history()

Returns the training history of the neural network.

Returns:

dict

A dictionary containing the training history.

normalize_data(input_data, mean, std_dev)[source]

Normalize the input data.

Parameters:

input_dataarray-like

Input data to be normalized.

meanfloat

Mean value for normalization.

std_devfloat

Standard deviation for normalization.

Returns:

array-like

Normalized input data.

predict(x, status=1)

Predicts the output for the given input data.

Parameters:

xarray-like

The input data for prediction.

Returns:

array-like

The predicted output for the input data.

update_learning_rate(epoch)

Updates the learning rates of all layers based on the current epoch.

Parameters:

epochint

The current epoch number.

verify_input(data)

Verifies the input data type for optimal performance of the RosenPY framework.

Parameters:

dataarray-like

The input data.