What is Julia's maxk(Matlab) that returns the indice of top K largest values?

General Usage
,
15

here a similar discussion

julia> using DataStructures

julia> function MaxN7(cr,N)
           maxn = heapify!(cr[1:N])
           maxn1=maxn[1]
              @inbounds for i in N+1:length(cr)
               e=cr[i]
               if maxn1 < e
                   heappop!(maxn)
                   heappush!(maxn,e)
                   maxn1=maxn[1]
                   end
               end
           sort!(maxn,rev=true)
       end
MaxN7 (generic function with 1 method)

# on my laptop

julia> @btime MaxN7(x, 5) setup=(x=randn(1000));
  722.951 ns (1 allocation: 96 bytes)

julia> @btime bottomk(x, 5) setup=(x=randn(1000));
  752.137 ns (5 allocations: 320 bytes)
3 Likes