Merge pull request #51 from sharanry/eye

Add alias to WhiteKernel, EyeKernel

Author: theogf

src/KernelFunctions.jl

@@ -8,7 +8,7 @@ export transform
 export params, duplicate, set! # Helpers
 
 export Kernel
-export ConstantKernel, WhiteKernel, ZeroKernel
+export ConstantKernel, WhiteKernel, EyeKernel, ZeroKernel
 export SqExponentialKernel, ExponentialKernel, GammaExponentialKernel
 export ExponentiatedKernel
 export MaternKernel, Matern32Kernel, Matern52Kernel

src/kernels/constant.jl

@@ -23,6 +23,8 @@ Kernel function working as an equivalent to add white noise.
 """
 struct WhiteKernel <: BaseKernel end
 
+const EyeKernel = WhiteKernel
+
 kappa(κ::WhiteKernel,δₓₓ::Real) = δₓₓ
 
 metric(::WhiteKernel) = Delta()

test/test_kernels.jl

@@ -16,6 +16,7 @@ x = rand()*2; v1 = rand(3); v2 = rand(3); id = IdentityTransform()
             @test eltype(k) == Any
             @test kappa(k,1.0) == 1.0
             @test kappa(k,0.0) == 0.0
+            @test EyeKernel == WhiteKernel
         end
         @testset "ConstantKernel" begin
             c = 2.0