scvi.module.VAEC

class scvi.module.VAEC(n_input, n_labels=0, n_hidden=128, n_latent=5, n_layers=2, log_variational=True, ct_weight=None, dropout_rate=0.05, **module_kwargs)

Bases: BaseModuleClass

Conditional Variational auto-encoder model.

This is an implementation of the CondSCVI model

Parameters:

n_input : int

Number of input genes

n_labels : int (default: 0)

Number of labels

n_hidden : int (default: 128)

Number of nodes per hidden layer

n_latent : int (default: 5)

Dimensionality of the latent space

n_layers : int (default: 2)

Number of hidden layers used for encoder and decoder NNs

dropout_rate : float (default: 0.05)

Dropout rate for the encoder and decoder neural network

log_variational : bool (default: True)

Log(data+1) prior to encoding for numerical stability. Not normalization.

Attributes table

Methods table

generative(z, library, y)	Runs the generative model.
inference(x, y[, n_samples])	High level inference method.
loss(tensors, inference_outputs, ...[, ...])	Compute the loss for a minibatch of data.
sample(tensors[, n_samples])	Generate observation samples from the posterior predictive distribution.

Attributes

T_destination

VAEC.T_destination

alias of TypeVar(‘T_destination’, bound=Mapping[str, Tensor])

alias of TypeVar(‘T_destination’, bound=Mapping[str, Tensor]) .. autoattribute:: VAEC.T_destination device ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

VAEC.device

dump_patches

VAEC.dump_patches: bool = False

This allows better BC support for load_state_dict(). In state_dict(), the version number will be saved as in the attribute _metadata of the returned state dict, and thus pickled. _metadata is a dictionary with keys that follow the naming convention of state dict. See _load_from_state_dict on how to use this information in loading.

If new parameters/buffers are added/removed from a module, this number shall be bumped, and the module’s _load_from_state_dict method can compare the version number and do appropriate changes if the state dict is from before the change.

training

VAEC.training: bool

Methods

generative

VAEC.generative(z, library, y)

Runs the generative model.

inference

VAEC.inference(x, y, n_samples=1)

High level inference method.

Runs the inference (encoder) model.

loss

VAEC.loss(tensors, inference_outputs, generative_outputs, kl_weight=1.0)

Compute the loss for a minibatch of data.

This function uses the outputs of the inference and generative functions to compute a loss. This many optionally include other penalty terms, which should be computed here.

This function should return an object of type LossRecorder.

sample

VAEC.sample(tensors, n_samples=1)

Generate observation samples from the posterior predictive distribution.

The posterior predictive distribution is written as \(p(\hat{x} \mid x)\).

Parameters:

tensors

Tensors dict

n_samples

Number of required samples for each cell

Return type:

ndarray

Returns:

x_new : torch.Tensor tensor with shape (n_cells, n_genes, n_samples)