Provide an option to colour plotted data points by a variable.

[DavidStirling]

Would be a nice feature which has been requested a few times. The reduction tool currently colours by class, but allowing other metadata to be used should be possible.

[abhamacher]

One more vote from me! as noted on my last image.sc thread

[imagesc-bot]

This issue has been mentioned on Image.sc Forum. There might be relevant details there:

https://forum.image.sc/t/color-coding-in-dimensionality-reduction-plot-cpa/60619/5