AdvancedActivation: Advanced activation layers
In YTLogos/kerasR: R Interface to the Keras Deep Learning Library

Description Usage Arguments Author(s) References See Also Examples

Advanced activation layers

LeakyReLU(alpha = 0.3, input_shape = NULL)

PReLU(input_shape = NULL)

ELU(alpha = 1, input_shape = NULL)

ThresholdedReLU(theta = 1, input_shape = NULL)

`alpha`	float >= 0. Negative slope coefficient in LeakyReLU and scale for the negative factor in ELU.
`input_shape`	only need when first layer of a model; sets the input shape of the data
`theta`	float >= 0. Threshold location of activation in ThresholdedReLU.

Taylor B. Arnold, taylor.arnold@acm.org

Chollet, Francois. 2015. Keras: Deep Learning library for Theano and TensorFlow.

Other layers: Activation, ActivityRegularization, BatchNormalization, Conv, Dense, Dropout, Embedding, Flatten, GaussianNoise, LayerWrapper, LocallyConnected, Masking, MaxPooling, Permute, RNN, RepeatVector, Reshape, Sequential

if(keras_available()) {
  X_train <- matrix(rnorm(100 * 10), nrow = 100)
  Y_train <- to_categorical(matrix(sample(0:2, 100, TRUE), ncol = 1), 3)
  
  mod <- Sequential()
  mod$add(Dense(units = 50, input_shape = dim(X_train)[2]))
  mod$add(LeakyReLU(alpha = 0.4))
  mod$add(Dense(units = 50))
  mod$add(ELU(alpha = 0.5))
  mod$add(Dense(units = 50))
  mod$add(ThresholdedReLU(theta = 1.1))
  mod$add(Dense(units = 3))
  mod$add(Activation("softmax"))
  keras_compile(mod,  loss = 'categorical_crossentropy', optimizer = RMSprop())
  
  keras_fit(mod, X_train, Y_train, batch_size = 32, epochs = 5, verbose = 0)
}