A quick disclaimer on backwards-compatibility for Toyplot users:

Toyplot follows the Semantic Versioning standard for assigning version numbers in a way that has specific meaning. As of this writing Toyplot releases are still in the 0.y.z development phase, which means (among other things) that the API may change at any time. We try not to be abusive about it, and there have been a handful of breaking changes in Toyplot’s history, but you should be prepared for the occasional bump on the road to the 1.0 release.