pyplot hexbin (#2679)

* pyplot hexbin

* pyplot hexbin changes

src/backends/pyplot.jl

@@ -612,7 +612,7 @@ function py_add_series(plt::Plot{PyPlotBackend}, series::Series)
             alpha = series[:fillalpha],
             cmap = py_fillcolormap(series),  # applies to the pcolorfast object
             zorder = series[:series_plotindex],
-            # extrakw...  # for some reason vmin and vmax are NaN???
+            # extrakw...  # We are not supporting clims for hexbin as calculation of bins is not trivial
         )
         push!(handles, handle)
     end

src/recipes.jl

@@ -460,7 +460,7 @@ end
 @deps plots_heatmap shape
 is_3d(::Type{Val{:plots_heatmap}}) = true
 RecipesPipeline.is_surface(::Type{Val{:plots_heatmap}}) = true
-
+RecipesPipeline.is_surface(::Type{Val{:hexbin}}) = true
 # ---------------------------------------------------------------------------
 # Histograms
 

src/utils.jl

@@ -448,7 +448,7 @@ values of the input.
 """
 function get_clims(series::Series, op=ignorenan_extrema)
     zmin, zmax = Inf, -Inf
-    z_colored_series = (:contour, :contour3d, :heatmap, :histogram2d, :surface)
+    z_colored_series = (:contour, :contour3d, :heatmap, :histogram2d, :surface, :hexbin)
     for vals in (series[:seriestype] in z_colored_series ? series[:z] : nothing, series[:line_z], series[:marker_z], series[:fill_z])
         if (typeof(vals) <: AbstractSurface) && (eltype(vals.surf) <: Union{Missing, Real})
             zmin, zmax = _update_clims(zmin, zmax, op(vals.surf)...)