implement copy for dataset (#111)

* implement copy for dataset

Can't believe we've missed that...

* bump proejct version

Project.toml

@@ -1,7 +1,7 @@
 name = "DelayEmbeddings"
 uuid = "5732040d-69e3-5649-938a-b6b4f237613f"
 repo = "https://github.com/JuliaDynamics/DelayEmbeddings.jl.git"
-version = "2.3.1"
+version = "2.3.2"
 
 [deps]
 Distances = "b4f34e82-e78d-54a5-968a-f98e89d6e8f7"

src/datasets/dataset.jl

@@ -11,10 +11,11 @@ abstract type AbstractDataset{D, T} end
 Return the dimension of the `thing`, in the sense of state-space dimensionality.
 """
 dimension(::AbstractDataset{D,T}) where {D,T} = D
-@inline Base.eltype(d::AbstractDataset{D,T}) where {D,T} = T
-import Base: ==
-==(d1::AbstractDataset, d2::AbstractDataset) = d1.data == d2.data
+Base.eltype(::AbstractDataset{D,T}) where {D,T} = T
+Base.:(==)(d1::AbstractDataset, d2::AbstractDataset) = d1.data == d2.data
 Base.vec(d::AbstractDataset) = d.data
+Base.copy(d::AbstractDataset) = typeof(d)(copy(d.data))
+
 
 # Size:
 @inline Base.length(d::AbstractDataset) = length(d.data)

test/dataset_tests.jl

@@ -7,7 +7,7 @@ println("\nTesting Dataset...")
   data = Dataset(rand(1001,3))
   xs = columns(data)
 
-  @testset "Concatenation/Append" begin 
+  @testset "Concatenation/Append" begin
     x, y, z = Dataset(rand(10, 2)), Dataset(rand(10, 2)), rand(10)
     @test Dataset(x) == x
     @test Dataset(x, y) isa Dataset
@@ -62,6 +62,15 @@ println("\nTesting Dataset...")
     @test_throws ErrorException (data[:,1] .= 0)
   end
 
+  @testset "copy" begin
+    d = Dataset(rand(10, 2))
+    v = vec(d)
+    d2 = copy(d)
+    d2[1] == d[1]
+    d2[1] = SVector(5.0, 5.0)
+    @test d2[1] != d[1]
+  end
+
   @testset "minmax" begin
     mi = minima(data)
     ma = maxima(data)