CONFIG.md

Configuration Files

Configuration files specify hyperparameter and architectural choices of an RGN model. They are comprised of a list of option specifications in the following format:

# Optional comment
camelCaseOption <optionValue>

Below are the major options along with their descriptions and allowed values. Not all options are documented. For a complete list see config.py.

IO

Option Name	Acceptable Values	Description
runName	string	user-specified model name
datasetName	string	user-specified dataset name
numEvoEntries	integer	number of entries present in evolutionary profiles
maxSeqLength	integer	longest acceptable protein (longer proteins will be ignored)
trainingShuffle	boolean	if True shuffle training set
evaluationShuffle	boolean	if True shuffle evaluation set
evaluationFrequency	integer	number of iterations between evaluations
predictionFrequency	integer	number of iterations between predicting structures
checkpointFrequency	integer	number of iterations between model checkpoints
numTrainingSamples	integer	number of samples when evaluating training set
numValidationSamples	integer	number of samples when evaluating validation set
numTestingSamples	integer	number of samples when evaluating test set
numTrainingInvocations	integer	number of batches to process when evaluating training set
numValidationInvocations	integer	number of batches to process when evaluating validation set
numTestingInvocations	integer	number of batches to process when evaluating test set

Architecture

Option Name	Acceptable Values	Description
includePrimary	boolean	if True include primary sequence as input
includeEvolutionary	boolean	if True include PSSM as input
tertiaryOutput	linear, linear_alphabet, angular, angular_alphabet	form of output units in last layer
alphabetSize	integer	alphabet size if using alphabetized output
alphabetTrainable	boolean	if True alphabet is trainable
recurrentNonlinearOutputProjSize	integer	if set specifies size of non-linear projection layer after last RNN layer
recurrentNonlinearOutputProjFunction	tanh, relu	type of non-linearity to use
recurrentUnit	LSTM, GRU, CudnnLSTM, CudnnGRU	type of RNN unit
recurrentSize	[integer, ...]	list of RNN layer sizes
bidirectional	boolean	whether RNN is uni- or bi-directional
higherOrderLayers	boolean	if True enables construction of more complex RNN architectures (all options below require this), and integrates RNN directions before passing on to next layer
includeRecurrentOutputsBetweenLayers	boolean	if True passes raw outputs of one layer to another
includeDihedralsBetweenLayers	boolean	if True passes dihedral outputs of one layer to another
residualConnectionsEveryNLayers	integer	connect layers residually every Nth layer
firstResidualConnectionFromNthLayer	integer	begin residual connections at the specified layer
recurrentToOutputSkipConnections	boolean	use skip connections from all hidden layers to final layer
inputToRecurrentSkipConnections	boolean	use skip connections from input layer to all hidden layers
allToRecurrentSkipConnections	boolean	use skip connections from all layers to final

Regularization

All keep probabilities correspond to 1 - dropout probability, and can be specified as a single real number to be used for all layers, or as a list of real numbers, one per layer.

Option Name	Acceptable Values	Description
recurInKeepProb	real or list of reals	keep probabilit(y,ies) of inputs to recurrent layers
recurOutKeepProb	real or list of reals	keep probabilit(y,ies) of outputs of recurrent layers
recurKeepProb	real or list of reals	keep probabilit(y,ies) of states of recurrent layers
recurStateZoneinProb	real or list of reals	zone in probabilit(y,ies) of states of recurrent layers
recurMemoryZoneinProb	real or list of reals	zone in probabilit(y,ies) of memories of recurrent layers
recurStateZoneinProb	real or list of reals	zone in probabilit(y,ies) of states of recurrent layers
recurVariationalDropout	boolean	if True uses variational dropout for recurrent state (requires recurKeepProb > 0)
alphabetKeepProb	real or list of reals	keep probabilit(y,ies) of alphabet
alphabetNormalization	[batch,layer]_normalization	normalization for alphabet layer, if not None

Optimization

Option Name	Acceptable Values	Description
batch_size	integer	batch size
bucketBoundaries	list of integers	specifies buckets (protein lengths) to use during batching
optimiser	steepest, momentum, rmsprop, adam, adagrad, adadelta	optimizer to use
learning_rate	real	optimizer learning rate
momentum	real	momentum in steepest and momentum optimizers
beta1	real	beta1 in adam optimizer
beta2	real	beta2 in adam optimizer
epsilon	real	epsilon in rmsprop, adam, and adadelta optimizers
decay	real	decay in rmsprop and adadelta (rho) optimizers
initAccumulatorValue	real	initial accumulator value in adagrad optimizer
rescaleBehavior	norm_rescaling or hard_clipping	gradient rescaling approach
gradientThreshold	real	threshold to use when rescaling gradients
recurrentThreshold	real	threshold for clipping RNN cells
alphabetTemperature	real between 0 and 1	temperature of alphabet softmax
numEpochs	integer	number of epochs to train for
validationMilestone	{iteration:drmsd, ...}	dictionary of (validation) dRMSDs that must be reached by corresponding iterations, otherwise training is restarted with a new seed

Initialization

Many initialization options accept an initialization dictionary of the form {'base': spec, 'bias': spec}, where 'base' controls the overall distribution and 'bias' the bias terms, and spec is of the form {'center': real, 'range': real, 'dist': <dist>} where <dist> can be one of 'gaussian', 'uniform', 'orthogonal', 'gaussian_variance_scaling', and 'uniform_variance_scaling'. Additional spec terms may be specifiable for some distributions.

Option Name	Acceptable Values	Description
randSeed	integer	random seed for initializing model
recurrentInit	one or a list of initialization dictionaries	initialization scheme for recurrent layers
recurrentOutProjInit	initialization dictionary	initialization scheme for output projection layer
recurrentNonlinearOutProjInit	initialization dictionary	initialization scheme for non-linear output projection layer
alphabetInit	initialization spec	initialization scheme for alphabet
recurrentForgetBias	real	initial value of forget bias in LSTM units

Compute

Additional compute-related options can be specified as command-line options to protling.py.

Option Name	Acceptable Values	Description
trainingDevice	CPU, GPU	where to place training model
evaluationDevice	CPU, GPU	where to place evaluation model