lmcinnes / umap / 714

88%

master: 88%

Pull #352

travis-ci

plot.py: Use `color_key` when datashading labels

Pass `color_key` to datashader when labels are provided. When `ds.count_cat` is used, the colors of the categories can be specified with `color_key`.

This allows the user to specify colors when plotting large data with labels; currently, colors cannot be specified, and if there are more than 22 labels this codepath throws an error.

Also, remove the `vdim` on the `hv.Points` plot since it is not used.

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