I am not sure I quite understand. But it looks like you know how to
improve the Jaccard distance code, so why not make a pull request at
Distances.jl?
> function myjaccard2(a::Array{Float64,1}, b::Array{Float64,1})
> num = 0
> den = 0
> for i in 1:length(a)
> num = num + min(a[i],b[i])
> den = den + max(a[i],b[i])
> end
> 1. - num/den
> end
Initialising num and den as Int gives you a type instability. This
should work better (plus a few cosmetic changes):
function myjaccard2(a::Array{Float64,1}, b::Array{Float64,1})
num = 0.0
den = 0.0
for i in 1:length(a)
num += min(a[i],b[i])
den += max(a[i],b[i])
end
return 1. - num/den
end
