cumul_integrate gives wrong result?

[islent]

julia> x = collect(1.0:5.0)
5-element Vector{Float64}:
 1.0
 2.0
 3.0
 4.0
 5.0

julia> y = x.^2
5-element Vector{Float64}:
  1.0
  4.0
  9.0
 16.0
 25.0

julia> cumul_integrate(x, y)
5-element Vector{Float64}:
  2.5
  5.0
 11.5
 24.0
 44.5

The result is different from https://www.mathworks.com/help/matlab/ref/cumtrapz.html

Should we expect an array like [2.5, 9.0, 21.5, 42.0] from cumul_integrate?

[natgeo-wong]

This is late, but I know what you have to do to get the cumtrapz result, which is the correct result.

You need to do z = cumul_integrate(x, y) and then do z = z[2:end] .- z[1]

I'll see if the original owner is still active.