Iterating over elements of upper triangular matrix, but cartesian indices are needed

New to Julia
,
3

Thanks. The custom function resulted to be the most practical alternative for now. For the records, it is this one:

@inline function iuppert(k::Integer,n::Integer)
  i = n - 1 - floor(Int,sqrt(-8*k + 4*n*(n-1) + 1)/2 - 0.5)
  j = k + i + ( (n-i+1)*(n-i) - n*(n-1) )÷2
  return i, j
end

julia> iuppert(1,3)
(1,2)

julia> iuppert(3,3)
(2,2)

julia> iuppert(3,4)
(1,4)