added fillto for gadfly/immerse

src/args.jl

@@ -234,7 +234,8 @@ function getSeriesRGBColor(c, d::Dict, n::Int)
   end
 
   # should be a RGB now... either it was passed in, generated automatically, or created from a string
-  @assert isa(c, RGB)
+  # @assert isa(c, RGB)
+  @assert isa(c, Colorant)
 
   # return the RGB
   c

src/backends/gadfly.jl

@@ -135,6 +135,16 @@ function addGadflySeries!(gplt, d::Dict)
   # add the Geoms
   append!(gfargs, getLineGeoms(d))
 
+  # fillto
+  if d[:fillto] != nothing
+    fillto = makevec(d[:fillto])
+    n = length(fillto)
+    push!(d[:kwargs], (:ymin, Float64[min(y, fillto[mod1(i,n)]) for (i,y) in enumerate(d[:y])]))
+    push!(d[:kwargs], (:ymax, Float64[max(y, fillto[mod1(i,n)]) for (i,y) in enumerate(d[:y])]))
+    # push!(d[:kwargs], (:ymax, Float64[max(y, fillto) for y in d[:y]]))
+    push!(gfargs, Gadfly.Geom.ribbon)
+  end
+  
   # handle markers
   geoms, guides = getMarkerGeomsAndGuides(d)
   append!(gfargs, geoms)

src/utils.jl

@@ -104,7 +104,8 @@ function sticksHack(; kw...)
   dLine, dScatter
 end
 
-
+makevec(v::AVec) = v
+makevec{T}(v::T) = T[v]
 
 
 function regressionXY(x, y)