Ribbons

[tbreloff]

Similar to this example, I'd like an easy way to add this to a plot. I think it should be attached to a series (and not its own series).. possibly with a ribbon keyword arg. Some possible syntax:

# add a ribbon, centered around y, with width 0.5
plot(y; ribbon = 0.5)

# add a ribbon, centered around y, where the width varies randomly
plot(y; ribbon = rand(length(y)))

# tuple of vectors... explicit min/max coords
plot(y; ribbon = (y-0.2, y+0.8))

# vector of tuples... explicit min/max coords
plot(y; ribbon = [(z-0.5, z+rand()) for z in 1:length(y)])

Probably should support ribboncolor, etc args as well.

[tbreloff]

This might be easiest to implement as a fillfrom argument... since fillto is defined to fill an area from y to fillto... this means we are already defining a fillfrom value and implicitly setting it to y. Make it explicit (default is that y == fillfrom) and we can draw ribbons.

That being said, I still think the ribbon argument can be shorthand for this functionality...

[diegozea]

+1 to ribbons on Plots.jl. Also would be great to have error bars like Gadfly on this package.

[tbreloff]

Heh... yes! I was thinking about that yesterday, and never got around to creating an issue... gonna do that now and link from here.

[tbreloff]

Closing in favor of #143