Add example notebook
Add example notebook

freeman-lab/altair,wrobstory/altair,tacaswell/altair,jakevdp/altair,tacaswell/altair,freeman-lab/altair,wrobstory/altair,altair-viz/altair,ellisonbg/altair,kootenpv/altair,alope107/altair,kootenpv/altair,alope107/altair