hex.schemas

Class DeepLearningV3.DeepLearningParametersV3

java.lang.Object

water.Iced

water.api.Schema<I,S>

water.api.schemas3.SchemaV3<P,S>

water.api.schemas3.ModelParametersSchemaV3<DeepLearningModel.DeepLearningParameters,DeepLearningV3.DeepLearningParametersV3>

hex.schemas.DeepLearningV3.DeepLearningParametersV3

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, java.lang.Cloneable, water.Freezable

Enclosing class:

DeepLearningV3

public static final class DeepLearningV3.DeepLearningParametersV3
extends water.api.schemas3.ModelParametersSchemaV3<DeepLearningModel.DeepLearningParameters,DeepLearningV3.DeepLearningParametersV3>

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class water.api.schemas3.SchemaV3

water.api.schemas3.SchemaV3.Meta

Nested classes/interfaces inherited from class water.api.Schema

water.api.Schema.AutoParseable

Field Summary

Fields

Modifier and Type	Field and Description
DeepLearningModel.DeepLearningParameters.Activation	activation The activation function (non-linearity) to be used by the neurons in the hidden layers.
boolean	adaptive_rate The implemented adaptive learning rate algorithm (ADADELTA) automatically combines the benefits of learning rate annealing and momentum training to avoid slow convergence.
boolean	autoencoder
double	average_activation
boolean	balance_classes For imbalanced data, balance training data class counts via over/under-sampling.
float[]	class_sampling_factors Desired over/under-sampling ratios per class (lexicographic order).
double	classification_stop The stopping criteria in terms of classification error (1-accuracy) on the training data scoring dataset.
boolean	col_major
boolean	diagnostics Gather diagnostics for hidden layers, such as mean and RMS values of learning rate, momentum, weights and biases.
boolean	elastic_averaging
double	elastic_averaging_moving_rate
double	elastic_averaging_regularization
double	epochs The number of passes over the training dataset to be carried out.
double	epsilon The second of two hyper parameters for adaptive learning rate (ADADELTA).
boolean	export_weights_and_biases
boolean	fast_mode Enable fast mode (minor approximation in back-propagation), should not affect results significantly.
static java.lang.String[]	fields
boolean	force_load_balance Increase training speed on small datasets by splitting it into many chunks to allow utilization of all cores.
int[]	hidden The number and size of each hidden layer in the model.
double[]	hidden_dropout_ratios A fraction of the inputs for each hidden layer to be omitted from training in order to improve generalization.
water.api.schemas3.KeyV3.FrameKeyV3[]	initial_biases
DeepLearningModel.DeepLearningParameters.InitialWeightDistribution	initial_weight_distribution The distribution from which initial weights are to be drawn.
double	initial_weight_scale The scale of the distribution function for Uniform or Normal distributions.
water.api.schemas3.KeyV3.FrameKeyV3[]	initial_weights
double	input_dropout_ratio A fraction of the features for each training row to be omitted from training in order to improve generalization (dimension sampling).
double	l1 A regularization method that constrains the absolute value of the weights and has the net effect of dropping some weights (setting them to zero) from a model to reduce complexity and avoid overfitting.
double	l2 A regularization method that constrains the sum of the squared weights.
DeepLearningModel.DeepLearningParameters.Loss	loss The loss (error) function to be minimized by the model.
float	max_after_balance_size When classes are balanced, limit the resulting dataset size to the specified multiple of the original dataset size.
int	max_categorical_features
int	max_confusion_matrix_size For classification models, the maximum size (in terms of classes) of the confusion matrix for it to be printed.
float	max_w2 A maximum on the sum of the squared incoming weights into any one neuron.
int	mini_batch_size
DeepLearningModel.DeepLearningParameters.MissingValuesHandling	missing_values_handling
double	momentum_ramp The momentum_ramp parameter controls the amount of learning for which momentum increases (assuming momentum_stable is larger than momentum_start).
double	momentum_stable The momentum_stable parameter controls the final momentum value reached after momentum_ramp training samples.
double	momentum_start The momentum_start parameter controls the amount of momentum at the beginning of training.
boolean	nesterov_accelerated_gradient The Nesterov accelerated gradient descent method is a modification to traditional gradient descent for convex functions.
boolean	overwrite_with_best_model If enabled, store the best model under the destination key of this model at the end of training.
water.api.schemas3.KeyV3.ModelKeyV3	pretrained_autoencoder
boolean	quiet_mode Enable quiet mode for less output to standard output.
double	rate When adaptive learning rate is disabled, the magnitude of the weight updates are determined by the user specified learning rate (potentially annealed), and are a function of the difference between the predicted value and the target value.
double	rate_annealing Learning rate annealing reduces the learning rate to "freeze" into local minima in the optimization landscape.
double	rate_decay The learning rate decay parameter controls the change of learning rate across layers.
double	regression_stop The stopping criteria in terms of regression error (MSE) on the training data scoring dataset.
boolean	replicate_training_data Replicate the entire training dataset onto every node for faster training on small datasets.
boolean	reproducible
double	rho The first of two hyper parameters for adaptive learning rate (ADADELTA).
double	score_duty_cycle Maximum fraction of wall clock time spent on model scoring on training and validation samples, and on diagnostics such as computation of feature importances (i.e., not on training).
double	score_interval The minimum time (in seconds) to elapse between model scoring.
long	score_training_samples The number of training dataset points to be used for scoring.
long	score_validation_samples The number of validation dataset points to be used for scoring.
DeepLearningModel.DeepLearningParameters.ClassSamplingMethod	score_validation_sampling Method used to sample the validation dataset for scoring, see Score Validation Samples above.
long	seed The random seed controls sampling and initialization.
boolean	shuffle_training_data Enable shuffling of training data (on each node).
boolean	single_node_mode Run on a single node for fine-tuning of model parameters.
boolean	sparse
double	sparsity_beta
boolean	standardize
double	target_ratio_comm_to_comp
long	train_samples_per_iteration The number of training data rows to be processed per iteration.
boolean	use_all_factor_levels
boolean	variable_importances Whether to compute variable importances for input features.

Fields inherited from class water.api.schemas3.ModelParametersSchemaV3

auc_type, categorical_encoding, checkpoint, custom_distribution_func, custom_metric_func, distribution, export_checkpoints_dir, fold_assignment, fold_column, gainslift_bins, huber_alpha, ignore_const_cols, ignored_columns, keep_cross_validation_fold_assignment, keep_cross_validation_models, keep_cross_validation_predictions, max_categorical_levels, max_runtime_secs, model_id, nfolds, offset_column, parallelize_cross_validation, quantile_alpha, response_column, score_each_iteration, stopping_metric, stopping_rounds, stopping_tolerance, training_frame, tweedie_power, validation_frame, weights_column

Fields inherited from class water.api.schemas3.SchemaV3

__meta

Constructor Summary

Constructors

Constructor and Description
DeepLearningParametersV3()

Method Summary

Methods inherited from class water.api.schemas3.ModelParametersSchemaV3

append_field_arrays, extractDeclaredApiParameters, fields, fillFromImpl, fillImpl, getAdditionalParameters, writeParametersJSON

Methods inherited from class water.api.schemas3.SchemaV3

writeJSON

Methods inherited from class water.api.Schema

createAndFillImpl, createImpl, extractVersionFromSchemaName, fillFromAny, fillFromBody, fillFromImpl, fillFromImpl, fillFromParms, fillFromParms, fillFromParms, fillImpl, getImplClass, getImplClass, getSchemaName, getSchemaType, getSchemaVersion, init_meta, markdown, markdown, newInstance, newInstance, setField, setSchemaType_doNotCall

Methods inherited from class water.Iced

asBytes, clone, copyOver, frozenType, read, readExternal, readJSON, reloadFromBytes, toJsonBytes, toJsonString, write, writeExternal

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

fields

public static java.lang.String[] fields

balance_classes

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     help="Balance training data class counts via over/under-sampling (for imbalanced data).")
public boolean balance_classes

For imbalanced data, balance training data class counts via over/under-sampling. This can result in improved predictive accuracy.

class_sampling_factors

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Desired over/under-sampling ratios per class (in lexicographic order). If not specified, sampling factors will be automatically computed to obtain class balance during training. Requires balance_classes.")
public float[] class_sampling_factors

Desired over/under-sampling ratios per class (lexicographic order). Only when balance_classes is enabled. If not specified, they will be automatically computed to obtain class balance during training.

max_after_balance_size

@API(level=expert,
     direction=INOUT,
     gridable=false,
     help="Maximum relative size of the training data after balancing class counts (can be less than 1.0). Requires balance_classes.")
public float max_after_balance_size

When classes are balanced, limit the resulting dataset size to the specified multiple of the original dataset size.

max_confusion_matrix_size

@API(level=secondary,
     direction=INOUT,
     gridable=false,
     help="[Deprecated] Maximum size (# classes) for confusion matrices to be printed in the Logs.")
public int max_confusion_matrix_size

For classification models, the maximum size (in terms of classes) of the confusion matrix for it to be printed. This option is meant to avoid printing extremely large confusion matrices.

activation

@API(level=critical,
     direction=INOUT,
     gridable=true,
     values={"Tanh","TanhWithDropout","Rectifier","RectifierWithDropout","Maxout","MaxoutWithDropout"},
     help="Activation function.")
public DeepLearningModel.DeepLearningParameters.Activation activation

The activation function (non-linearity) to be used by the neurons in the hidden layers. Tanh: Hyperbolic tangent function (same as scaled and shifted sigmoid). Rectifier: Rectifier Linear Unit: Chooses the maximum of (0, x) where x is the input value. Maxout: Choose the maximum coordinate of the input vector. ExpRectifier: Exponential Rectifier Linear Unit function (http://arxiv.org/pdf/1511.07289v2.pdf) With Dropout: Zero out a random user-given fraction of the incoming weights to each hidden layer during training, for each training row. This effectively trains exponentially many models at once, and can improve generalization.

hidden

@API(level=critical,
     direction=INOUT,
     gridable=true,
     help="Hidden layer sizes (e.g. [100, 100]).")
public int[] hidden

The number and size of each hidden layer in the model. For example, if a user specifies "100,200,100" a model with 3 hidden layers will be produced, and the middle hidden layer will have 200 neurons.

epochs

@API(level=critical,
     direction=INOUT,
     gridable=true,
     help="How many times the dataset should be iterated (streamed), can be fractional.")
public double epochs

The number of passes over the training dataset to be carried out. It is recommended to start with lower values for initial grid searches. This value can be modified during checkpoint restarts and allows continuation of selected models.

train_samples_per_iteration

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     help="Number of training samples (globally) per MapReduce iteration. Special values are 0: one epoch, -1: all available data (e.g., replicated training data), -2: automatic.")
public long train_samples_per_iteration

The number of training data rows to be processed per iteration. Note that independent of this parameter, each row is used immediately to update the model with (online) stochastic gradient descent. This parameter controls the synchronization period between nodes in a distributed environment and the frequency at which scoring and model cancellation can happen. For example, if it is set to 10,000 on H2O running on 4 nodes, then each node will process 2,500 rows per iteration, sampling randomly from their local data. Then, model averaging between the nodes takes place, and scoring can happen (dependent on scoring interval and duty factor). Special values are 0 for one epoch per iteration, -1 for processing the maximum amount of data per iteration (if **replicate training data** is enabled, N epochs will be trained per iteration on N nodes, otherwise one epoch). Special value of -2 turns on automatic mode (auto-tuning).

target_ratio_comm_to_comp

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Target ratio of communication overhead to computation. Only for multi-node operation and train_samples_per_iteration = -2 (auto-tuning).")
public double target_ratio_comm_to_comp

seed

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Seed for random numbers (affects sampling) - Note: only reproducible when running single threaded.")
public long seed

The random seed controls sampling and initialization. Reproducible results are only expected with single-threaded operation (i.e., when running on one node, turning off load balancing and providing a small dataset that fits in one chunk). In general, the multi-threaded asynchronous updates to the model parameters will result in (intentional) race conditions and non-reproducible results. Note that deterministic sampling and initialization might still lead to some weak sense of determinism in the model.

adaptive_rate

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     help="Adaptive learning rate.")
public boolean adaptive_rate

The implemented adaptive learning rate algorithm (ADADELTA) automatically combines the benefits of learning rate annealing and momentum training to avoid slow convergence. Specification of only two parameters (rho and epsilon) simplifies hyper parameter search. In some cases, manually controlled (non-adaptive) learning rate and momentum specifications can lead to better results, but require the specification (and hyper parameter search) of up to 7 parameters. If the model is built on a topology with many local minima or long plateaus, it is possible for a constant learning rate to produce sub-optimal results. Learning rate annealing allows digging deeper into local minima, while rate decay allows specification of different learning rates per layer. When the gradient is being estimated in a long valley in the optimization landscape, a large learning rate can cause the gradient to oscillate and move in the wrong direction. When the gradient is computed on a relatively flat surface with small learning rates, the model can converge far slower than necessary.

rho

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Adaptive learning rate time decay factor (similarity to prior updates).")
public double rho

The first of two hyper parameters for adaptive learning rate (ADADELTA). It is similar to momentum and relates to the memory to prior weight updates. Typical values are between 0.9 and 0.999. This parameter is only active if adaptive learning rate is enabled.

epsilon

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Adaptive learning rate smoothing factor (to avoid divisions by zero and allow progress).")
public double epsilon

The second of two hyper parameters for adaptive learning rate (ADADELTA). It is similar to learning rate annealing during initial training and momentum at later stages where it allows forward progress. Typical values are between 1e-10 and 1e-4. This parameter is only active if adaptive learning rate is enabled.

rate

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Learning rate (higher => less stable, lower => slower convergence).")
public double rate

When adaptive learning rate is disabled, the magnitude of the weight updates are determined by the user specified learning rate (potentially annealed), and are a function of the difference between the predicted value and the target value. That difference, generally called delta, is only available at the output layer. To correct the output at each hidden layer, back propagation is used. Momentum modifies back propagation by allowing prior iterations to influence the current update. Using the momentum parameter can aid in avoiding local minima and the associated instability. Too much momentum can lead to instabilities, that's why the momentum is best ramped up slowly. This parameter is only active if adaptive learning rate is disabled.

rate_annealing

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Learning rate annealing: rate / (1 + rate_annealing * samples).")
public double rate_annealing

Learning rate annealing reduces the learning rate to "freeze" into local minima in the optimization landscape. The annealing rate is the inverse of the number of training samples it takes to cut the learning rate in half (e.g., 1e-6 means that it takes 1e6 training samples to halve the learning rate). This parameter is only active if adaptive learning rate is disabled.

rate_decay

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Learning rate decay factor between layers (N-th layer: rate * rate_decay ^ (n - 1).")
public double rate_decay

The learning rate decay parameter controls the change of learning rate across layers. For example, assume the rate parameter is set to 0.01, and the rate_decay parameter is set to 0.5. Then the learning rate for the weights connecting the input and first hidden layer will be 0.01, the learning rate for the weights connecting the first and the second hidden layer will be 0.005, and the learning rate for the weights connecting the second and third hidden layer will be 0.0025, etc. This parameter is only active if adaptive learning rate is disabled.

momentum_start

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Initial momentum at the beginning of training (try 0.5).")
public double momentum_start

The momentum_start parameter controls the amount of momentum at the beginning of training. This parameter is only active if adaptive learning rate is disabled.

momentum_ramp

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Number of training samples for which momentum increases.")
public double momentum_ramp

The momentum_ramp parameter controls the amount of learning for which momentum increases (assuming momentum_stable is larger than momentum_start). The ramp is measured in the number of training samples. This parameter is only active if adaptive learning rate is disabled.

momentum_stable

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Final momentum after the ramp is over (try 0.99).")
public double momentum_stable

The momentum_stable parameter controls the final momentum value reached after momentum_ramp training samples. The momentum used for training will remain the same for training beyond reaching that point. This parameter is only active if adaptive learning rate is disabled.

nesterov_accelerated_gradient

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Use Nesterov accelerated gradient (recommended).")
public boolean nesterov_accelerated_gradient

The Nesterov accelerated gradient descent method is a modification to traditional gradient descent for convex functions. The method relies on gradient information at various points to build a polynomial approximation that minimizes the residuals in fewer iterations of the descent. This parameter is only active if adaptive learning rate is disabled.

input_dropout_ratio

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     help="Input layer dropout ratio (can improve generalization, try 0.1 or 0.2).")
public double input_dropout_ratio

A fraction of the features for each training row to be omitted from training in order to improve generalization (dimension sampling).

hidden_dropout_ratios

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     help="Hidden layer dropout ratios (can improve generalization), specify one value per hidden layer, defaults to 0.5.")
public double[] hidden_dropout_ratios

A fraction of the inputs for each hidden layer to be omitted from training in order to improve generalization. Defaults to 0.5 for each hidden layer if omitted.

l1

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     help="L1 regularization (can add stability and improve generalization, causes many weights to become 0).")
public double l1

A regularization method that constrains the absolute value of the weights and has the net effect of dropping some weights (setting them to zero) from a model to reduce complexity and avoid overfitting.

l2

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     help="L2 regularization (can add stability and improve generalization, causes many weights to be small.")
public double l2

A regularization method that constrains the sum of the squared weights. This method introduces bias into parameter estimates, but frequently produces substantial gains in modeling as estimate variance is reduced.

max_w2

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Constraint for squared sum of incoming weights per unit (e.g. for Rectifier).")
public float max_w2

A maximum on the sum of the squared incoming weights into any one neuron. This tuning parameter is especially useful for unbound activation functions such as Maxout or Rectifier.

initial_weight_distribution

@API(level=expert,
     direction=INOUT,
     gridable=true,
     values={"UniformAdaptive","Uniform","Normal"},
     help="Initial weight distribution.")
public DeepLearningModel.DeepLearningParameters.InitialWeightDistribution initial_weight_distribution

The distribution from which initial weights are to be drawn. The default option is an optimized initialization that considers the size of the network. The "uniform" option uses a uniform distribution with a mean of 0 and a given interval. The "normal" option draws weights from the standard normal distribution with a mean of 0 and given standard deviation.

initial_weight_scale

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Uniform: -value...value, Normal: stddev.")
public double initial_weight_scale

The scale of the distribution function for Uniform or Normal distributions. For Uniform, the values are drawn uniformly from -initial_weight_scale...initial_weight_scale. For Normal, the values are drawn from a Normal distribution with a standard deviation of initial_weight_scale.

initial_weights

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="A list of H2OFrame ids to initialize the weight matrices of this model with.")
public water.api.schemas3.KeyV3.FrameKeyV3[] initial_weights

initial_biases

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="A list of H2OFrame ids to initialize the bias vectors of this model with.")
public water.api.schemas3.KeyV3.FrameKeyV3[] initial_biases

loss

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     required=false,
     values={"Automatic","CrossEntropy","Quadratic","Huber","Absolute","Quantile"},
     help="Loss function.")
public DeepLearningModel.DeepLearningParameters.Loss loss

The loss (error) function to be minimized by the model. CrossEntropy loss is used when the model output consists of independent hypotheses, and the outputs can be interpreted as the probability that each hypothesis is true. Cross entropy is the recommended loss function when the target values are class labels, and especially for imbalanced data. It strongly penalizes error in the prediction of the actual class label. Quadratic loss is used when the model output are continuous real values, but can be used for classification as well (where it emphasizes the error on all output classes, not just for the actual class).

score_interval

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     help="Shortest time interval (in seconds) between model scoring.")
public double score_interval

The minimum time (in seconds) to elapse between model scoring. The actual interval is determined by the number of training samples per iteration and the scoring duty cycle.

score_training_samples

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     help="Number of training set samples for scoring (0 for all).")
public long score_training_samples

The number of training dataset points to be used for scoring. Will be randomly sampled. Use 0 for selecting the entire training dataset.

score_validation_samples

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     help="Number of validation set samples for scoring (0 for all).")
public long score_validation_samples

The number of validation dataset points to be used for scoring. Can be randomly sampled or stratified (if "balance classes" is set and "score validation sampling" is set to stratify). Use 0 for selecting the entire training dataset.

score_duty_cycle

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     help="Maximum duty cycle fraction for scoring (lower: more training, higher: more scoring).")
public double score_duty_cycle

Maximum fraction of wall clock time spent on model scoring on training and validation samples, and on diagnostics such as computation of feature importances (i.e., not on training).

classification_stop

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Stopping criterion for classification error fraction on training data (-1 to disable).")
public double classification_stop

The stopping criteria in terms of classification error (1-accuracy) on the training data scoring dataset. When the error is at or below this threshold, training stops.

regression_stop

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Stopping criterion for regression error (MSE) on training data (-1 to disable).")
public double regression_stop

The stopping criteria in terms of regression error (MSE) on the training data scoring dataset. When the error is at or below this threshold, training stops.

quiet_mode

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Enable quiet mode for less output to standard output.")
public boolean quiet_mode

Enable quiet mode for less output to standard output.

score_validation_sampling

@API(level=expert,
     direction=INOUT,
     gridable=true,
     values={"Uniform","Stratified"},
     help="Method used to sample validation dataset for scoring.")
public DeepLearningModel.DeepLearningParameters.ClassSamplingMethod score_validation_sampling

Method used to sample the validation dataset for scoring, see Score Validation Samples above.

overwrite_with_best_model

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="If enabled, override the final model with the best model found during training.")
public boolean overwrite_with_best_model

If enabled, store the best model under the destination key of this model at the end of training. Only applicable if training is not cancelled.

autoencoder

@API(level=secondary,
     direction=INOUT,
     help="Auto-Encoder.")
public boolean autoencoder

use_all_factor_levels

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     help="Use all factor levels of categorical variables. Otherwise, the first factor level is omitted (without loss of accuracy). Useful for variable importances and auto-enabled for autoencoder.")
public boolean use_all_factor_levels

standardize

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     help="If enabled, automatically standardize the data. If disabled, the user must provide properly scaled input data.")
public boolean standardize

diagnostics

@API(level=expert,
     direction=INOUT,
     help="Enable diagnostics for hidden layers.")
public boolean diagnostics

Gather diagnostics for hidden layers, such as mean and RMS values of learning rate, momentum, weights and biases.

variable_importances

@API(level=critical,
     direction=INOUT,
     gridable=true,
     help="Compute variable importances for input features (Gedeon method) - can be slow for large networks.")
public boolean variable_importances

Whether to compute variable importances for input features. The implemented method (by Gedeon) considers the weights connecting the input features to the first two hidden layers.

fast_mode

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Enable fast mode (minor approximation in back-propagation).")
public boolean fast_mode

Enable fast mode (minor approximation in back-propagation), should not affect results significantly.

force_load_balance

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Force extra load balancing to increase training speed for small datasets (to keep all cores busy).")
public boolean force_load_balance

Increase training speed on small datasets by splitting it into many chunks to allow utilization of all cores.

replicate_training_data

@API(level=secondary,
     direction=INOUT,
     gridable=true,
     help="Replicate the entire training dataset onto every node for faster training on small datasets.")
public boolean replicate_training_data

Replicate the entire training dataset onto every node for faster training on small datasets.

single_node_mode

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Run on a single node for fine-tuning of model parameters.")
public boolean single_node_mode

Run on a single node for fine-tuning of model parameters. Can be useful for checkpoint resumes after training on multiple nodes for fast initial convergence.

shuffle_training_data

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Enable shuffling of training data (recommended if training data is replicated and train_samples_per_iteration is close to #nodes x #rows, of if using balance_classes).")
public boolean shuffle_training_data

Enable shuffling of training data (on each node). This option is recommended if training data is replicated on N nodes, and the number of training samples per iteration is close to N times the dataset size, where all nodes train will (almost) all the data. It is automatically enabled if the number of training samples per iteration is set to -1 (or to N times the dataset size or larger).

missing_values_handling

@API(level=expert,
     direction=INOUT,
     gridable=true,
     values={"MeanImputation","Skip"},
     help="Handling of missing values. Either MeanImputation or Skip.")
public DeepLearningModel.DeepLearningParameters.MissingValuesHandling missing_values_handling

sparse

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Sparse data handling (more efficient for data with lots of 0 values).")
public boolean sparse

col_major

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="#DEPRECATED Use a column major weight matrix for input layer. Can speed up forward propagation, but might slow down backpropagation.")
public boolean col_major

average_activation

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Average activation for sparse auto-encoder. #Experimental")
public double average_activation

sparsity_beta

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Sparsity regularization. #Experimental")
public double sparsity_beta

max_categorical_features

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Max. number of categorical features, enforced via hashing. #Experimental")
public int max_categorical_features

reproducible

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Force reproducibility on small data (will be slow - only uses 1 thread).")
public boolean reproducible

export_weights_and_biases

@API(level=expert,
     direction=INOUT,
     help="Whether to export Neural Network weights and biases to H2O Frames.")
public boolean export_weights_and_biases

mini_batch_size

@API(level=expert,
     direction=INOUT,
     help="Mini-batch size (smaller leads to better fit, larger can speed up and generalize better).")
public int mini_batch_size

elastic_averaging

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Elastic averaging between compute nodes can improve distributed model convergence. #Experimental")
public boolean elastic_averaging

elastic_averaging_moving_rate

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Elastic averaging moving rate (only if elastic averaging is enabled).")
public double elastic_averaging_moving_rate

elastic_averaging_regularization

@API(level=expert,
     direction=INOUT,
     gridable=true,
     help="Elastic averaging regularization strength (only if elastic averaging is enabled).")
public double elastic_averaging_regularization

pretrained_autoencoder

@API(level=expert,
     direction=INOUT,
     help="Pretrained autoencoder model to initialize this model with.")
public water.api.schemas3.KeyV3.ModelKeyV3 pretrained_autoencoder

Constructor Detail

DeepLearningParametersV3

public DeepLearningParametersV3()