confusmat() errors if class contains 0 #35
Description
if the classes in gt or pred contains 0 the function confusmat errors out with the following error.
gr=[0,1,0,1]
pr=[0,0,1,1]
confusmat(2, gr, pr)
ERROR: BoundsError: attempt to access 2×2 Array{Int64,2} at index [0,0]
in confusmat(::Int64, ::Array{Int64,1}, ::Array{Int64,1}) at /Users/abisen/.julia/v0.5/MLBase/src/perfeval.jl:17
where as if the classes does not contain 0 everything works
gr=[1,2,1,2]
pr=[1,1,2,2]
confusmat(2, gr, pr)
2×2 Array{Int64,2}:
1 1
1 1