Orange: Neural Network
Revision as of 10:05, 23 January 2020 by Onnowpurbo (talk | contribs)
Sumber:https://docs.biolab.si//3/visual-programming/widgets/model/neuralnetwork.html
A multi-layer perceptron (MLP) algorithm with backpropagation.
Inputs
Data: input dataset Preprocessor: preprocessing method(s)
Outputs
Learner: multi-layer perceptron learning algorithm Model: trained model
The Neural Network widget uses sklearn’s Multi-layer Perceptron algorithm that can learn non-linear models as well as linear.
A name under which it will appear in other widgets. The default name is “Neural Network”.
Set model parameters:
Neurons per hidden layer: defined as the ith element represents the number of neurons in the ith hidden layer. E.g. a neural network with 3 layers can be defined as 2, 3, 2.
Activation function for the hidden layer:
Identity: no-op activation, useful to implement linear bottleneck
Logistic: the logistic sigmoid function
tanh: the hyperbolic tan function
ReLu: the rectified linear unit function
Solver for weight optimization:
L-BFGS-B: an optimizer in the family of quasi-Newton methods
SGD: stochastic gradient descent
Adam: stochastic gradient-based optimizer
Alpha: L2 penalty (regularization term) parameter
Max iterations: maximum number of iterations
Other parameters are set to sklearn’s defaults.
Produce a report.
When the box is ticked (Apply Automatically), the widget will communicate changes automatically. Alternatively, click Apply.
Contoh
The first example is a classification task on iris dataset. We compare the results of Neural Network with the Logistic Regression.
The second example is a prediction task, still using the iris data. This workflow shows how to use the Learner output. We input the Neural Network prediction model into Predictions and observe the predicted values.
Contoh WorkFlow lainnya,
