Library-neutral plotting interface

[v0dro]

Ruby does not have support for very good plotting libraries and therefore it does not make sense to be tied down to one (nyaplot in this case). We should explore more options and ultimately create a plotting interface that can function as a top level abstraction to libraries like nyaplot, gnuplotrb, rubyvis, etc.

[zverok]

That is a super-cool idea; I'm thinking about something similar through several weeks... Though, I'm not sure that it should be a part of Daru, rather "meta-plotting" library with dependency on Daru and optional dependencies on all and every plotting libraries available.

[v0dro]

That works too. Or it can be a separate extension to daru in the daru source that can be required with daru/plotting

[zverok]

(Adding to milestone, to be merged into "extract parts to daru-view", and then closed)