julia> using StatsBase
Why 100 elemnts vector has not 100 elements autocor output ?
julia> autocor(rand(10))
10-element Array{Float64,1}:
1.0
0.363742
-0.11318
-0.222987
0.0235896
0.0205071
-0.135124
-0.242747
-0.140223
-0.0535775
julia> autocor(rand(100))
21-element Array{Float64,1}:
1.0
0.0187758
-0.105103
-0.0232407
0.0636284
0.0438567
-0.246789
-0.00484981
0.00894277
-0.0909333
-0.00114724
0.142196
0.0421625
0.0117317
0.109289
0.122338
-0.0507566
-0.114893
0.130828
-0.0543573
-0.0132691
