Try replacing your definition of Q with Q = rand(79,18) and WH with WH = rand(5,18). Do you still get the same error?
Also, are you sure the error you’re getting isn’t something like ERROR: LoadError: BoundsError: attempt to access 8-element Array{Int64,1} at index [1, 5]? Note the [1, 5] at the end and not the [1.5] as you wrote in a previous post.