get_keras_optimizer: Get Keras Optimizer

Description

Utility function to construct optimiser from keras, primarily for internal use.

Usage

get_keras_optimizer(
  optimizer = "adam",
  lr = 0.001,
  beta_1 = 0.9,
  beta_2 = 0.999,
  epsilon = 1e-07,
  decay = NULL,
  clipnorm = NULL,
  clipvalue = NULL,
  momentum = 0,
  nesterov = FALSE,
  rho = 0.95,
  global_clipnorm = NULL,
  use_ema = FALSE,
  ema_momentum = 0.99,
  ema_overwrite_frequency = NULL,
  jit_compile = TRUE,
  initial_accumultator_value = 0.1,
  amsgrad = FALSE,
  lr_power = -0.5,
  l1_regularization_strength = 0,
  l2_regularization_strength = 0,
  l2_shrinkage_regularization_strength = 0,
  beta = 0,
  centered = FALSE
)

Value

No return value.

Arguments

optimizer: (character(1))
Optimizer to construct, see details for those available. Default is "adam".
lr: (numeric(1))
Learning rate passed to all optimizers.
beta_1, beta_2: (numeric(1))
Passed to adamax, adam, and nadam.
epsilon: (numeric(1))
Passed to adadelta, adagrad, adam, adamax, nadam, rmsprop
decay, clipnorm, clipvalue, global_clipnorm: (numeric(1))
Passed to all optimizers.
momentum: (numeric(1))
Passed to rmsprop and sgd.
nesterov: (logical(1))
Passed to sgd.
rho: (numeric(1))
Passed to adadelta and rmsprop.
use_ema, jit_compile: (logical(1))
Passed to all optimizers.
ema_momentum, ema_overwrite_frequency: (numeric(1))
Passed to all optimizers.
initial_accumultator_value: (numeric(1))
Passed to adagrad and ftrl.
amsgrad: (logical(1))
Passed to adam and sgd.
lr_power, l1_regularization_strength, l2_regularization_strength, l2_shrinkage_regularization_strength, beta: (numeric(1))
Passed to ftrl.
centered: (logical(1))
Passed to rmsprop.

Details

Implemented optimizers are

"adadelta"
keras::optimizer_adadelta
"adagrad"
keras::optimizer_adagrad
"adam"
keras::optimizer_adam
"adamax"
keras::optimizer_adamax
"ftrl"
keras::optimizer_ftrl
"nadam"
keras::optimizer_nadam
"rmsprop"
keras::optimizer_rmsprop
"sgd"
keras::optimizer_sgd