input nodes
output nodes
an Array of tensor containing all the weights and biases of this graph, used when different nodes of this graph may share the same weight or bias.
Computing the gradient of the module with respect to its own input.
Computing the gradient of the module with respect to its own input. This is returned in gradInput. Also, the gradInput state variable is updated accordingly.
Computes the output using the current parameter set of the class and input.
Computes the output using the current parameter set of the class and input. This function returns the result which is stored in the output field.
Computing the gradient of the module with respect to its own parameters.
Computing the gradient of the module with respect to its own parameters. Many modules do not perform this step as they do not have any parameters. The state variable name for the parameters is module dependent. The module is expected to accumulate the gradients with respect to the parameters in some variable.
Add a sub-module to the contained modules
For a multi-tensor output module, some output tensors may not contributed to the final forward result.
For a multi-tensor output module, some output tensors may not contributed to the final forward result. So in the back propagation, the gradient on these positions are missing. And we use zero tensor to populate.
Find a module with given name.
Find a module with given name. If there is no module with given name, it will return None. If there are multiple modules with the given name, an exception will be thrown.
Performs a back-propagation step through the module, with respect to the given input.
Performs a back-propagation step through the module, with respect to the given input. In general this method makes the assumption forward(input) has been called before, with the same input. This is necessary for optimization reasons. If you do not respect this rule, backward() will compute incorrect gradients.
input data
gradient of next layer
gradient corresponding to input data
get execution engine type
get execution engine type
Clear cached activities to save storage space or network bandwidth.
Clear cached activities to save storage space or network bandwidth. Note that we use Tensor.set to keep some information like tensor share
The subclass should override this method if it allocate some extra resource, and call the super.clearState in the override method
use ValidationMethod to evaluate module
use ValidationMethod to evaluate module
dataset for test
validation methods
total batchsize of all partitions, optional param and default 4 * partitionNum of dataset
Takes an input object, and computes the corresponding output of the module.
Takes an input object, and computes the corresponding output of the module. After a forward, the output state variable should have been updated to the new value.
input data
output data
set an array of layers that match the given names
set an array of layers that match the given names
an array of layer names
current graph model
freeze the module, i.
freeze the module,
i.e. their parameters(weight/bias, if exists) are not changed in training process
if names is not empty,
set an array of layers that match the given names
an array of layer names
current graph model
Get extra parameter in this module.
Get extra parameter in this module. Extra parameter means the trainable parameters beside weight and bias. Such as runningMean and runningVar in BatchNormalization.
The subclass should override this method if it has some parameters besides weight and bias.
an array of tensor
get forward executions, the dummy node will be filtered
get forward executions, the dummy node will be filtered
Get the module name, default name is className@namePostfix
Float or Double
This method compact all parameters and gradients of the model into two tensors.
This method compact all parameters and gradients of the model into two tensors. So it's easier to use optim method
This function returns a table contains ModuleName, the parameter names and parameter value in this module.
This function returns a table contains ModuleName, the parameter names and parameter value in this module. The result table is a structure of Table(ModuleName -> Table(ParameterName -> ParameterValue)), and the type is Table[String, Table[String, Tensor[T]]].
For example, get the weight of a module named conv1: table[Table]("conv1")[Tensor[T]]("weight").
Custom modules should override this function if they have parameters.
Table
Get the scale of gradientBias
Get the scale of gradientBias
Get the scale of gradientWeight
Get the scale of gradientWeight
Get forward executions, the dummy nodes and control dependency nodes will be filtered.
Get forward executions, the dummy nodes and control dependency nodes will be filtered.
This method will output a sorted executions. If the graph contains loop, it will throw an exception
Get weight and bias for the module
The cached gradient of activities.
The cached gradient of activities. So we don't compute it again when need it
Build graph: some other modules point to current module
Build graph: some other modules point to current module
distinguish from another inputs when input parameter list is empty
upstream module nodes and the output tensor index. The start index is 1.
node containing current module
Build graph: some other modules point to current module
Build graph: some other modules point to current module
upstream module nodes in an array
node containing current module
Build graph: some other modules point to current module
Build graph: some other modules point to current module
upstream module nodes
node containing current module
input nodes
whether stop propagating gradInput back
whether stop propagating gradInput back
copy weights from another model, mapping by layer name
copy weights from another model, mapping by layer name
model to copy from
whether to match all layers' weights and bias,
current module
load pretrained weights and bias to current module
load pretrained weights and bias to current module
file to store weights and bias
whether to match all layers' weights and bias, if not, only load existing pretrained weights and bias
current module
Return the corresponding node has the given name.
Return the corresponding node has the given name. If the given name doesn't match any node, NoSuchElementException will be thrown
The cached output.
The cached output. So we don't compute it again when need it
This function returns two arrays.
This function returns two arrays. One for the weights and the other the gradients Custom modules should override this function if they have parameters
(Array of weights, Array of grad)
module predict, return the probability distribution
module predict, return the probability distribution
dataset for prediction
total batchSize for all partitions. if -1, default is 4 * partitionNumber of datatset
whether to share same memory for each batch predict results
module predict, return the predict label
module predict, return the predict label
dataset for prediction
total batchSize for all partitions. if -1, default is 4 * partitionNumber of dataset
model predict images, return imageFrame with predicted tensor
model predict images, return imageFrame with predicted tensor
imageFrame that contains images
if outputLayer is not null, the output of layer that matches outputLayer will be used as predicted output
whether to share same memory for each batch predict results
batch size per partition, default is 4
key to store predicted result
Save this module definition to path.
Save this module definition to path.
path to save module, local file system, HDFS and Amazon S3 is supported. HDFS path should be like "hdfs://[host]:[port]/xxx" Amazon S3 path should be like "s3a://bucket/xxx"
if overwrite
self
Save current model graph to a folder, which can be display in tensorboard by running tensorboard --logdir logPath
Save current model graph to a folder, which can be display in tensorboard by running tensorboard --logdir logPath
Draw backward graph instead of forward
Save this module to path with protobuf format
Save this module to path with protobuf format
path to save module, local file system, HDFS and Amazon S3 is supported. HDFS path should be like "hdfs://[host]:[port]/xxx" Amazon S3 path should be like "s3a://bucket/xxx"
where to store weight
if overwrite
self
save weights and bias to file
save weights and bias to file
file to save
whether to overwrite or not
The scale of gradient weight and gradient bias before gradParameters being accumulated.
The scale of gradient weight and gradient bias before gradParameters being accumulated.
Set extra parameter to this module.
Set extra parameter to this module. Extra parameter means the trainable parameters beside weight and bias. Such as runningMean and runningVar in BatchNormalization.
this
Set the module name
Set the scale of gradientBias
Set the scale of gradientBias
the value of the scale of gradientBias
this
Set the scale of gradientWeight
Set the scale of gradientWeight
the value of the scale of gradientWeight
this
Set weight and bias for the module
Set weight and bias for the module
array of weights and bias
stop the input gradient of layers that match the given names
stop the input gradient of layers that match the given names
an array of layer names
current graph model
Generate graph module with start nodes
Module status.
Module status. It is useful for modules like dropout/batch normalization
"unfreeze" module, i.
"unfreeze" module, i.e. make the module parameters(weight/bias, if exists) to be trained(updated) in training process if names is not empty, unfreeze layers that match given names
array of module names to unFreeze
If the module has parameters, this will zero the accumulation of the gradients with respect to these parameters.
If the module has parameters, this will zero the accumulation of the gradients with respect to these parameters. Otherwise, it does nothing.
Save this module to path.
Save this module to path.
path to save module, local file system, HDFS and Amazon S3 is supported. HDFS path should be like "hdfs://[host]:[port]/xxx" Amazon S3 path should be like "s3a://bucket/xxx"
if overwrite
self
please use recommended saveModule(path, overWrite)
A graph container. The modules in the container are connected as a directed Graph. Each module can output one tensor or multiple tensors(as table). The edges between modules in the graph define how these tensors are passed. For example, if a module outputs two tensors, you can pass these two tensors together to its following module, or pass only one of them to its following module. If a tensor in the module output is connected to multiple modules, in the back propagation, the gradients from multiple connection will be accumulated. If multiple edges point to one module, the tensors from these edges will be stack as a table, then pass to that module. In the back propagation, the gradients will be splited based on how the input tensors stack.
The graph container has multiple inputs and multiple outputs. The order of the input tensors should be same with the order of the input nodes when you construct the graph container. In the back propagation, the order of the gradients tensors should be the same with the order of the output nodes.
If there's one output, the module output is a tensor. If there're multiple outputs, the module output is a table, which is actually an sequence of tensor. The order of the output tensors is same with the order of the output modules.
All inputs should be able to connect to outputs through some paths in the graph. It is allowed that some successors of the inputs node are not connect to outputs. If so, these nodes will be excluded in the computation.
Numeric type. Only support float/double now