Fix WeightVec deprecation from StatsBase 0.15 (#254)

* Fix WeightVec deprecation from StatsBase 0.15

* enable travis on 0.6 for master

.travis.yml

@@ -1,6 +1,6 @@
 language: julia
 julia:
-  # - 0.6
+  - 0.6
   - nightly
 os:
   - linux

REQUIRE

@@ -1,5 +1,5 @@
 julia 0.6.0-pre
 Compat 0.8.6
-StatsBase 0.14.0
+StatsBase 0.15.0
 Reexport
 SpecialFunctions

src/extras.jl

@@ -5,7 +5,7 @@ function StatsBase.addcounts!{T,U}(cm::Dict{U,Int}, x::AbstractDataArray{T})
     return cm
 end
 
-function StatsBase.addcounts!{T,U,W}(cm::Dict{U,W}, x::AbstractDataArray{T}, wv::WeightVec{W})
+function StatsBase.addcounts!{T,U,W}(cm::Dict{U,W}, x::AbstractDataArray{T}, wv::Weights{W})
     n = length(x)
     length(wv) == n || raise_dimerror()
     w = values(wv)
@@ -23,7 +23,7 @@ function StatsBase.countmap{T}(x::AbstractDataArray{T})
     addcounts!(Dict{Union{T, NAtype}, Int}(), x)
 end
 
-function StatsBase.countmap{T,W}(x::AbstractDataArray{T}, wv::WeightVec{W})
+function StatsBase.countmap{T,W}(x::AbstractDataArray{T}, wv::Weights{W})
     addcounts!(Dict{Union{T, NAtype}, W}(), x, wv)
 end
 

src/reduce.jl

@@ -175,7 +175,7 @@ Base.std(A::DataArray; corrected::Bool=true, mean=nothing, skipna::Bool=false) =
 
 ## weighted mean
 
-function Base.mean(a::DataArray, w::WeightVec; skipna::Bool=false)
+function Base.mean(a::DataArray, w::Weights; skipna::Bool=false)
     if skipna
         v = a .* w.values
         sum(v; skipna=true) / sum(DataArray(w.values, v.na); skipna=true)
@@ -184,7 +184,7 @@ function Base.mean(a::DataArray, w::WeightVec; skipna::Bool=false)
     end
 end
 
-function Base.mean{W,V<:DataArray}(a::DataArray, w::WeightVec{W,V}; skipna::Bool=false)
+function Base.mean{W,V<:DataArray}(a::DataArray, w::Weights{W,V}; skipna::Bool=false)
     if skipna
         v = a .* w.values
         sum(v; skipna=true) / sum(DataArray(w.values.data, v.na); skipna=true)