JuliaMath / Interpolations.jl

Looking at some examples at https://juliamath.github.io/Interpolations.jl/stable/control/
i see

a = rand(10) # test data

# Nearest-neighbor interpolation
itp = interpolate(a, BSpline(Constant()))
v = itp(5.4)   # returns a[5]

# Previous-neighbor interpolation
itp = interpolate(a, BSpline(Constant(Previous)))  # this fails

because

julia> Constant(Previous)
ERROR: MethodError: no method matching (Constant{Nearest})(::Type{Previous})
Closest candidates are:
  (Constant{T})() where T<:Interpolations.ConstantInterpType at ~/.julia/packages/Interpolations/Sxe87/src/b-splines/constant.jl:41
  (Constant{T})(::Periodic{Nothing}) where T<:Interpolations.ConstantInterpType at ~/.julia/packages/Interpolations/Sxe87/src/b-splines/constant.jl:43
  (Constant{T})(::BC) where {T<:Interpolations.ConstantInterpType, BC<:Interpolations.BoundaryCondition} at ~/.julia/packages/Interpolations/Sxe87/src/b-splines/constant.jl:42
Stacktrace:
 [1] Constant(args::Type)
   @ Interpolations ~/.julia/packages/Interpolations/Sxe87/src/b-splines/constant.jl:40
 [2] top-level scope
   @ REPL[16]:1

As far as I can tell, you are supposed to do

itp = interpolate(a, BSpline(Constant{Previous}()))

Tested on julia 1.8.0 and 1.7.3 with Interpolations v0.14.6

So i think just the documentation is wrong here?

Interpolations.jl/docs/src/control.md

Line 18 in 33409a6

itp = interpolate(a, BSpline(Constant(Previous)))

Constant(Previous) doesn't work (incorrect documentation?)