Geom.violin with color

[Mattriks]

Enables mapping violin color to a suitable variable (#1074).
An example:

using DataFrames
group = ["S","A","T"]
D = vcat([DataFrame( y=(j-1)+randn(20), x=g*"$j", group=g)  for j in 1:2, g in group]...)
plot(D, x=:x, y=:y, Geom.violin, color=:group)

[bjarthur]

looks great. do you have time to update the documentation to mention that color is an aesthetic?

[codecov-io]

Codecov Report

Merging #1081 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #1081   +/-   ##
=======================================
  Coverage   86.36%   86.36%           
=======================================
  Files          32       32           
  Lines        3939     3939           
=======================================
  Hits         3402     3402           
  Misses        537      537

Impacted Files	Coverage Δ
src/statistics.jl	93.21% <100%> (+0.53%)	⬆️
src/geom/violin.jl	100% <100%> (ø)	⬆️
src/geom/polygon.jl	55.55% <0%> (-8.89%)	⬇️
src/theme.jl	64.15% <0%> (-1.89%)	⬇️

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[Mattriks]

Ok, done.

[bjarthur]

thanks!

[Mattriks]

Great! Issues #1074 and #1018 can be closed

[bjarthur]

closed them. next time, start your original post with "closes " and then the issue numbers and it will auto-close them when merged. thanks again!