Small correction due to the change of RefValue

Author: theogf

src/generic.jl

@@ -24,14 +24,14 @@ end
 ## Constructors for kernels without parameters
 for kernel in [:ExponentialKernel,:SqExponentialKernel,:Matern32Kernel,:Matern52Kernel,:ExponentiatedKernel]
     @eval begin
-        $kernel(ρ::T=1.0) where {T<:Real} =   $kernel{T,ScaleTransform{T}}(ScaleTransform(ρ))
+        $kernel(ρ::T=1.0) where {T<:Real} =   $kernel{T,ScaleTransform{Base.RefValue{T}}}(ScaleTransform(ρ))
         $kernel(ρ::A) where {A<:AbstractVector{<:Real}} = $kernel{eltype(A),ScaleTransform{A}}(ScaleTransform(ρ))
         $kernel(t::Tr) where {Tr<:Transform} = $kernel{eltype(t),Tr}(t)
     end
 end
 
-function set!()
-
+function set!(k::Kernel,x)
+    @error "Setting parameters to this kernel is either not possible or has not been implemented"
 end
 
 function set!(k::Kernel{T,ScaleTransform{Base.RefValue{<:Tρ}}},ρ::Tρ) where {T,Tρ<:Real}

src/transform/scaletransform.jl

@@ -15,7 +15,7 @@ end
 
 function ScaleTransform(s::T=1.0) where {T<:Real}
     @check_args(ScaleTransform, s, s > zero(T), "s > 0")
-    ScaleTransform{T}(Ref(s))
+    ScaleTransform{Base.RefValue{T}}(Ref(s))
 end
 
 function ScaleTransform(s::T,dims::Integer) where {T<:Real} # TODO Add test
@@ -49,4 +49,4 @@ end
 transform(t::ScaleTransform{<:AbstractVector{<:Real}},x::AbstractVector{<:Real},obsdim::Int=defaultobs) = t.s .* x
 _transform(t::ScaleTransform{<:AbstractVector{<:Real}},X::AbstractMatrix{<:Real},obsdim::Int=defaultobs) = obsdim == 1 ? t.s'.*X : t.s .* X
 
-transform(t::ScaleTransform{Base.RefValue{<:Real}},x::AbstractVecOrMat,obsdim::Int=defaultobs) = t.s[] .* x
+transform(t::ScaleTransform{<:Base.RefValue{<:Real}},x::AbstractVecOrMat,obsdim::Int=defaultobs) = t.s[] .* x