Crate dense

An encoder/decoder to/from dense files.

A file format simpler and denser than MNIST, a dense file is binary file of seqeuantial training examples and nothing else (example->label->example->label->etc.).

Example labels and datapoints within examples can be stored using from 1 to 8 bytes (label_bytes and data_bytes respectively).

Functions

read	Reads from dense file.
write	Writes to dense file.