Ok I get one: julia> df = DataFrame(A = 1:4, B = ["M", "F", "F", "M"])
4x2 DataFrame:
A B
[1,] 1 "M"
[2,] 2 "F"
[3,] 3 "F"
[4,] 4 "M"
julia> pool!(df)
julia> ModelMatrix(ModelFrame(Formula(:A,:B), df))
ModelMatrix{Float64}(4x2 Array{Float64,2}:
1.0 1.0
1.0 0.0
1.0 0.0
1.0 1.0,[0,1])
Le jeudi 3 avril 2014 23:53:46 UTC+2, Stéphane Laurent a écrit :
>
> Hello,
> Please, does someone have an example of a dataframe with a "factor"
> variable ?
>
