Allow manual flipping of yaxis for images.

src/pipeline.jl

@@ -360,7 +360,6 @@ function _expand_subplot_extrema(sp::Subplot, d::KW, st::Symbol)
         xmin, xmax = ignorenan_extrema(d[:x]); ymin, ymax = ignorenan_extrema(d[:y])
         expand_extrema!(sp[:xaxis], (xmin, xmax))
         expand_extrema!(sp[:yaxis], (ymin, ymax))
-        sp[:yaxis].d[:flip] = true
     elseif !(st in (:pie, :histogram, :bins2d, :histogram2d))
         expand_extrema!(sp, d)
     end

src/series.jl

@@ -321,6 +321,7 @@ end
     n, m = size(mat)
     if is_seriestype_supported(:image)
         seriestype := :image
+        yflip --> true
         SliceIt, 1:m, 1:n, Surface(mat)
     else
         seriestype := :heatmap
@@ -338,6 +339,7 @@ end
 
     if is_seriestype_supported(:image)
         seriestype := :image
+        yflip --> true
         SliceIt, 1:m, 1:n, Surface(mat)
     else
         seriestype := :heatmap
@@ -472,6 +474,7 @@ end
 @recipe function f(x::AVec, y::AVec, mat::AMat{T}) where T<:Gray
     if is_seriestype_supported(:image)
         seriestype := :image
+        yflip --> true
         SliceIt, x, y, Surface(mat)
     else
         seriestype := :heatmap
@@ -487,6 +490,7 @@ end
 @recipe function f(x::AVec, y::AVec, mat::AMat{T}) where T<:Colorant
     if is_seriestype_supported(:image)
         seriestype := :image
+        yflip --> true
         SliceIt, x, y, Surface(mat)
     else
         seriestype := :heatmap