vaeac_dataset function

Dataset used by the vaeac model

Convert a the data into a torch::dataset() which the vaeac model creates batches from.

vaeac_dataset(X, one_hot_max_sizes)

Arguments

• X: A torch_tensor contain the data of shape N x p, where N and p are the number of observations and features, respectively.

• one_hot_max_sizes: A torch tensor of dimension n_features containing the one hot sizes of the n_features

  features. That is, if the ith feature is a categorical feature with 5 levels, then one_hot_max_sizes[i] = 5. While the size for continuous features can either be 0 or 1.

Details

This function creates a torch::dataset() object that represent a map from keys to data samples. It is used by the torch::dataloader() to load data which should be used to extract the batches for all epochs in the training phase of the neural network. Note that a dataset object is an R6 instance, see https://r6.r-lib.org/articles/Introduction.html, which is classical object-oriented programming, with self reference. I.e, vaeac_dataset() is a subclass of type torch::dataset().

Author(s)

Lars Henry Berge Olsen