# spector

> Sparse vectors.

## Docs

### API Reference

#### Classes

- [indices](https://coady.github.io/spector/reference/indices.html): A sparse boolean array, i.e., set of indices
- [vector](https://coady.github.io/spector/reference/vector.html): A sparse array of index keys mapped to numeric values
- [matrix](https://coady.github.io/spector/reference/matrix.html): A sparse vector of vectors

#### Functions

- [groupby](https://coady.github.io/spector/reference/groupby.html): Generate unique keys with associated groups