garage.tf.q_functions.discrete_cnn_q_function module¶
Discrete CNN QFunction with CNN-MLP structure.
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class
DiscreteCNNQFunction
(env_spec, filters, strides, hidden_sizes=(256, ), name=None, padding='SAME', max_pooling=False, pool_strides=(2, 2), pool_shapes=(2, 2), cnn_hidden_nonlinearity=<function relu>, hidden_nonlinearity=<function relu>, hidden_w_init=<tensorflow.python.ops.init_ops_v2.GlorotUniform object>, hidden_b_init=<tensorflow.python.ops.init_ops_v2.Zeros object>, output_nonlinearity=None, output_w_init=<tensorflow.python.ops.init_ops_v2.GlorotUniform object>, output_b_init=<tensorflow.python.ops.init_ops_v2.Zeros object>, dueling=False, layer_normalization=False)[source]¶ Bases:
garage.tf.q_functions.q_function.QFunction
Q function based on a CNN-MLP structure for discrete action space.
This class implements a Q value network to predict Q based on the input state and action. It uses an CNN and a MLP to fit the function of Q(s, a).
Parameters: - env_spec (garage.envs.env_spec.EnvSpec) – Environment specification.
- filters (Tuple[Tuple[int, Tuple[int, int]], ..]) – Number and dimension of filters. For example, ((3, (3, 5)), (32, (3, 3))) means there are two convolutional layers. The filter for the first layer have 3 channels and its shape is (3 x 5), while the filter for the second layer have 32 channels and its shape is (3 x 3).
- strides (tuple[int]) – The stride of the sliding window. For example, (1, 2) means there are two convolutional layers. The stride of the filter for first layer is 1 and that of the second layer is 2.
- hidden_sizes (list[int]) – Output dimension of dense layer(s). For example, (32, 32) means the MLP of this q-function consists of two hidden layers, each with 32 hidden units.
- name (str) – Variable scope of the cnn.
- padding (str) – The type of padding algorithm to use, either ‘SAME’ or ‘VALID’.
- max_pooling (bool) – Boolean for using max pooling layer or not.
- pool_shapes (tuple[int]) – Dimension of the pooling layer(s). For example, (2, 2) means that all the pooling layers have shape (2, 2).
- pool_strides (tuple[int]) – The strides of the pooling layer(s). For example, (2, 2) means that all the pooling layers have strides (2, 2).
- cnn_hidden_nonlinearity (callable) – Activation function for intermediate dense layer(s) in the CNN. It should return a tf.Tensor. Set it to None to maintain a linear activation.
- hidden_nonlinearity (callable) – Activation function for intermediate dense layer(s) in the MLP. It should return a tf.Tensor. Set it to None to maintain a linear activation.
- hidden_w_init (callable) – Initializer function for the weight of intermediate dense layer(s) in the MLP. The function should return a tf.Tensor.
- hidden_b_init (callable) – Initializer function for the bias of intermediate dense layer(s) in the MLP. The function should return a tf.Tensor.
- output_nonlinearity (callable) – Activation function for output dense layer in the MLP. It should return a tf.Tensor. Set it to None to maintain a linear activation.
- output_w_init (callable) – Initializer function for the weight of output dense layer(s) in the MLP. The function should return a tf.Tensor.
- output_b_init (callable) – Initializer function for the bias of output dense layer(s) in the MLP. The function should return a tf.Tensor.
- dueling (bool) – Bool for using dueling network or not.
- layer_normalization (bool) – Bool for using layer normalization or not.
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clone
(name)[source]¶ Return a clone of the Q-function.
It only copies the configuration of the Q-function, not the parameters.
Parameters: name (str) – Name of the newly created q-function. Returns: Clone of this object Return type: garage.tf.q_functions.DiscreteCNNQFunction
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get_qval_sym
(state_input, name)[source]¶ Symbolic graph for q-network.
Parameters: - state_input (tf.Tensor) – The state input tf.Tensor to the network.
- name (str) – Network variable scope.
Returns: The tf.Tensor output of Discrete CNN QFunction.
Return type: tf.Tensor
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input
¶ Get input.
Returns: QFunction Input. Return type: tf.Tensor