Convert RAW Quickdraw datafiles into Stroke-5 format with RDP at variable epsilon

The notebook convert_ndjson.ipynb will convert .ndjson files into the .npz files one can use to train sketch-rnn. We set the target length to be 200 steps, and vary epsilon parameters to control the granuarity of the RDP algorithm.

To download an .ndjson file, try:

wget https://storage.googleapis.com/quickdraw_dataset/full/raw/jail.ndjson

To download the jail class

And we assume it is saved in a subdir called /ndjson for this notebook.