diff --git a/.travis.yml b/.travis.yml
index a7b00026..4ca5071d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ language: julia
 os:
   - linux
 julia:
-  - 1.3
+  - 1.4
 env:
   global:
   - PYTHON=conda
diff --git a/Manifest.toml b/Manifest.toml
index a5a7e7d3..77da56ed 100644
--- a/Manifest.toml
+++ b/Manifest.toml
@@ -14,15 +14,21 @@ version = "0.4.0"
 
 [[Arpack_jll]]
 deps = ["Libdl", "OpenBLAS_jll", "Pkg"]
-git-tree-sha1 = "68a90a692ddc0eb72d69a6993ca26e2a923bf195"
+git-tree-sha1 = "e214a9b9bd1b4e1b4f15b22c0994862b66af7ff7"
 uuid = "68821587-b530-5797-8361-c406ea357684"
-version = "3.5.0+2"
+version = "3.5.0+3"
 
 [[ArrayInterface]]
 deps = ["LinearAlgebra", "Requires", "SparseArrays"]
-git-tree-sha1 = "4f1109cf20b2a31b5196f346bba07b2c61587442"
+git-tree-sha1 = "5f34aee5e5dbc1ce5cfb137d63f719a64d98ae82"
 uuid = "4fba245c-0d91-5ea0-9b3e-6abc04ee57a9"
-version = "2.4.1"
+version = "2.8.5"
+
+[[ArrayLayouts]]
+deps = ["FillArrays", "LinearAlgebra"]
+git-tree-sha1 = "f8904599065b57f51715faf6278126f853aef6fc"
+uuid = "4c555306-a7a7-4459-81d9-ec55ddd5c99a"
+version = "0.2.4"
 
 [[AxisAlgorithms]]
 deps = ["LinearAlgebra", "Random", "SparseArrays", "WoodburyMatrices"]
@@ -30,6 +36,11 @@ git-tree-sha1 = "a4d07a1c313392a77042855df46c5f534076fab9"
 uuid = "13072b0f-2c55-5437-9ae7-d433b7a33950"
 version = "1.0.0"
 
+[[BSON]]
+git-tree-sha1 = "e794bd8f3f319218e8c8b46657631bdbea2807ca"
+uuid = "fbb218c0-5317-5bc6-957e-2ee96dd4b1f0"
+version = "0.2.5"
+
 [[Base64]]
 uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
 
@@ -41,15 +52,15 @@ version = "0.5.8"
 
 [[Bzip2_jll]]
 deps = ["Libdl", "Pkg"]
-git-tree-sha1 = "92463331a641b19fc3baa427e0b76cdbd54dc05d"
+git-tree-sha1 = "3663bfffede2ef41358b6fc2e1d8a6d50b3c3904"
 uuid = "6e34b625-4abd-537c-b88f-471c36dfa7a0"
-version = "1.0.6+1"
+version = "1.0.6+2"
 
 [[CSV]]
 deps = ["CategoricalArrays", "DataFrames", "Dates", "FilePathsBase", "Mmap", "Parsers", "PooledArrays", "Tables", "Unicode", "WeakRefStrings"]
-git-tree-sha1 = "dd7861a31c6a2a9404186a80e5dec919a25b3abb"
+git-tree-sha1 = "8fe77a5478781d59a9ba17f0ac47dda2be5f8ae7"
 uuid = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"
-version = "0.5.25"
+version = "0.6.1"
 
 [[CategoricalArrays]]
 deps = ["Compat", "DataAPI", "Future", "JSON", "Missings", "Printf", "Reexport", "Statistics", "Unicode"]
@@ -59,9 +70,9 @@ version = "0.7.7"
 
 [[Clustering]]
 deps = ["Distances", "LinearAlgebra", "NearestNeighbors", "Printf", "SparseArrays", "Statistics", "StatsBase"]
-git-tree-sha1 = "f387d5937d0c9d0191c711d7d204bce15bd23b45"
+git-tree-sha1 = "7846d785d9e4bcc904b70689bde8413f85b0ca20"
 uuid = "aaaa29a8-35af-508c-8bc3-b662a17a0fe5"
-version = "0.13.3"
+version = "0.14.0"
 
 [[CodecZlib]]
 deps = ["BinaryProvider", "Libdl", "TranscodingStreams"]
@@ -71,15 +82,15 @@ version = "0.6.0"
 
 [[ColorTypes]]
 deps = ["FixedPointNumbers", "Random"]
-git-tree-sha1 = "b9de8dc6106e09c79f3f776c27c62360d30e5eb8"
+git-tree-sha1 = "dc232130b48be37c2612d32a3196f37f3aa50e24"
 uuid = "3da002f7-5984-5a60-b8a6-cbb66c0b333f"
-version = "0.9.1"
+version = "0.10.1"
 
 [[Colors]]
-deps = ["ColorTypes", "FixedPointNumbers", "InteractiveUtils", "Printf", "Reexport"]
-git-tree-sha1 = "177d8b959d3c103a6d57574c38ee79c81059c31b"
+deps = ["ColorTypes", "FixedPointNumbers", "InteractiveUtils", "Reexport"]
+git-tree-sha1 = "2fdeb981ebcf52cd800ddb6a0aa5eac34153552d"
 uuid = "5ae59095-9a9b-59fe-a467-6f913c188581"
-version = "0.11.2"
+version = "0.12.0"
 
 [[CommonSubexpressions]]
 deps = ["Test"]
@@ -88,21 +99,21 @@ uuid = "bbf7d656-a473-5ed7-a52c-81e309532950"
 version = "0.2.0"
 
 [[Compat]]
-deps = ["Base64", "Dates", "DelimitedFiles", "Distributed", "InteractiveUtils", "LibGit2", "Libdl", "LinearAlgebra", "Markdown", "Mmap", "Pkg", "Printf", "REPL", "Random", "Serialization", "SharedArrays", "Sockets", "SparseArrays", "Statistics", "Test", "UUIDs", "Unicode"]
-git-tree-sha1 = "ed2c4abadf84c53d9e58510b5fc48912c2336fbb"
+deps = ["Base64", "Dates", "DelimitedFiles", "Distributed", "InteractiveUtils", "LibGit2", "Libdl", "LinearAlgebra", "Markdown", "Mmap", "Pkg", "Printf", "REPL", "Random", "SHA", "Serialization", "SharedArrays", "Sockets", "SparseArrays", "Statistics", "Test", "UUIDs", "Unicode"]
+git-tree-sha1 = "0198d18b28c093bef39872a22f1a897218a925f5"
 uuid = "34da2185-b29b-5c13-b0c7-acf172513d20"
-version = "2.2.0"
+version = "3.8.0"
 
 [[CompilerSupportLibraries_jll]]
 deps = ["Libdl", "Pkg"]
-git-tree-sha1 = "b57c5d019367c90f234a7bc7e24ff0a84971da5d"
+git-tree-sha1 = "7c4f882c41faa72118841185afc58a2eb00ef612"
 uuid = "e66e0078-7015-5450-92f7-15fbd957f2ae"
-version = "0.2.0+1"
+version = "0.3.3+0"
 
 [[ComputationalResources]]
-git-tree-sha1 = "59aa488537311b5401f39faeb07ca7621e36e256"
+git-tree-sha1 = "52cb3ec90e8a8bea0e62e275ba577ad0f74821f7"
 uuid = "ed09eef8-17a6-5b46-8889-db040fac31e3"
-version = "0.3.1"
+version = "0.3.2"
 
 [[Conda]]
 deps = ["JSON", "VersionParsing"]
@@ -111,10 +122,10 @@ uuid = "8f4d0f93-b110-5947-807f-2305c1781a2d"
 version = "1.4.1"
 
 [[Contour]]
-deps = ["LinearAlgebra", "StaticArrays", "Test"]
-git-tree-sha1 = "b974e164358fea753ef853ce7bad97afec15bb80"
+deps = ["StaticArrays"]
+git-tree-sha1 = "6d56f927b33d3820561b8f89d7de311718683846"
 uuid = "d38c429a-6771-53c6-b99e-75d170b6e991"
-version = "0.5.1"
+version = "0.5.2"
 
 [[Crayons]]
 git-tree-sha1 = "cb7a62895da739fe5bb43f1a26d4292baf4b3dc0"
@@ -134,9 +145,9 @@ version = "0.20.2"
 
 [[DataStructures]]
 deps = ["InteractiveUtils", "OrderedCollections"]
-git-tree-sha1 = "5a431d46abf2ef2a4d5d00bd0ae61f651cf854c8"
+git-tree-sha1 = "4dead20a1606a60292529023d6eac18a1ef6432e"
 uuid = "864edb3b-99cc-5e75-8d2d-829cb0a9cfe8"
-version = "0.17.10"
+version = "0.17.12"
 
 [[DataValueInterfaces]]
 git-tree-sha1 = "bfc1187b79289637fa0ef6d4436ebdfe6905cbd6"
@@ -187,9 +198,9 @@ uuid = "8ba89e20-285c-5b6f-9357-94700520ee1b"
 
 [[Distributions]]
 deps = ["FillArrays", "LinearAlgebra", "PDMats", "Printf", "QuadGK", "Random", "SpecialFunctions", "Statistics", "StatsBase", "StatsFuns"]
-git-tree-sha1 = "6b19601c0e98de3a8964ed33ad73e130c7165b1d"
+git-tree-sha1 = "c4ed10355637fcb0725dc6a27060f74df24f13cd"
 uuid = "31c24e10-a181-5473-b8eb-7969acd0382f"
-version = "0.22.4"
+version = "0.23.2"
 
 [[DocStringExtensions]]
 deps = ["LibGit2", "Markdown", "Pkg", "Test"]
@@ -199,14 +210,14 @@ version = "0.8.1"
 
 [[Documenter]]
 deps = ["Base64", "Dates", "DocStringExtensions", "InteractiveUtils", "JSON", "LibGit2", "Logging", "Markdown", "REPL", "Test", "Unicode"]
-git-tree-sha1 = "d497bcc45bb98a1fbe19445a774cfafeabc6c6df"
+git-tree-sha1 = "bc99c157ff2957c058a1067061d16c2c83d1ec42"
 uuid = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
-version = "0.24.5"
+version = "0.24.9"
 
 [[ElasticArrays]]
-git-tree-sha1 = "5b5b7cb8cba44bcf337b8af0a1f3e57c89468660"
+git-tree-sha1 = "6643de157ea3332d73e35a6a6ed2bdffe7792b12"
 uuid = "fdbdab4c-e67f-52f5-8c3f-e7b388dad3d4"
-version = "1.0.0"
+version = "1.1.0"
 
 [[ElasticPDMats]]
 deps = ["LinearAlgebra", "MacroTools", "PDMats", "Test"]
@@ -215,9 +226,9 @@ uuid = "2904ab23-551e-5aed-883f-487f97af5226"
 version = "0.2.1"
 
 [[ExprTools]]
-git-tree-sha1 = "08c1f74d9ad03acf0ee84c12c9e665ab1a9a6e33"
+git-tree-sha1 = "6f0517056812fd6aa3af23d4b70d5325a2ae4e95"
 uuid = "e2ba6199-217a-4e67-a87a-7c52f15ade04"
-version = "0.1.0"
+version = "0.1.1"
 
 [[EzXML]]
 deps = ["Printf", "XML2_jll"]
@@ -245,9 +256,9 @@ version = "1.2.0"
 
 [[FFTW_jll]]
 deps = ["Libdl", "Pkg"]
-git-tree-sha1 = "ddb57f4cf125243b4aa4908c94d73a805f3cbf2c"
+git-tree-sha1 = "6c975cd606128d45d1df432fb812d6eb10fee00b"
 uuid = "f5851436-0d7a-5f13-b9de-f02708fd171a"
-version = "3.3.9+4"
+version = "3.3.9+5"
 
 [[FastGaussQuadrature]]
 deps = ["LinearAlgebra", "SpecialFunctions"]
@@ -257,9 +268,9 @@ version = "0.4.2"
 
 [[FileIO]]
 deps = ["Pkg"]
-git-tree-sha1 = "2c84c57aced468fa21763c66d3bef33adcd09ec7"
+git-tree-sha1 = "3d7cb2c4c850439f19c4d6d3fbe1dce6481cddb1"
 uuid = "5789e2e9-d7fb-5bc7-8068-2c6fae9b9549"
-version = "1.2.2"
+version = "1.2.4"
 
 [[FilePathsBase]]
 deps = ["Dates", "LinearAlgebra", "Printf", "Test", "UUIDs"]
@@ -272,20 +283,20 @@ uuid = "7b1f6079-737a-58dc-b8bc-7a2ca5c1b5ee"
 
 [[FillArrays]]
 deps = ["LinearAlgebra", "Random", "SparseArrays"]
-git-tree-sha1 = "85c6b57e2680fa28d5c8adc798967377646fbf66"
+git-tree-sha1 = "51cc2f9bc4eb9c6c0e81ec2f779d1085583cc956"
 uuid = "1a297f60-69ca-5386-bcde-b61e274b549b"
-version = "0.8.5"
+version = "0.8.7"
 
 [[FiniteDiff]]
 deps = ["ArrayInterface", "LinearAlgebra", "Requires", "SparseArrays", "StaticArrays"]
-git-tree-sha1 = "aa78e468afa6a0fde472c3dba0782d1ab60b203d"
+git-tree-sha1 = "f60e5d6944975f7140bde67278e10b6b01fb4f29"
 uuid = "6a86dc24-6348-571c-b903-95158fe2bd41"
-version = "2.2.1"
+version = "2.3.0"
 
 [[FixedPointNumbers]]
-git-tree-sha1 = "4aaea64dd0c30ad79037084f8ca2b94348e65eaa"
+git-tree-sha1 = "3ba9ea634d4c8b289d590403b4a06f8e227a6238"
 uuid = "53c48c17-4a7d-5ca2-90c5-79b7896eea93"
-version = "0.7.1"
+version = "0.8.0"
 
 [[Formatting]]
 deps = ["Printf"]
@@ -295,26 +306,26 @@ version = "0.4.1"
 
 [[ForwardDiff]]
 deps = ["CommonSubexpressions", "DiffResults", "DiffRules", "NaNMath", "Random", "SpecialFunctions", "StaticArrays"]
-git-tree-sha1 = "88b082d492be6b63f967b6c96b352e25ced1a34c"
+git-tree-sha1 = "869540e4367122fbffaace383a5bdc34d6e5e5ac"
 uuid = "f6369f11-7733-5829-9624-2563aa707210"
-version = "0.10.9"
+version = "0.10.10"
 
 [[Franklin]]
 deps = ["Dates", "DelimitedFiles", "DocStringExtensions", "FranklinTemplates", "HTTP", "Literate", "LiveServer", "Logging", "Markdown", "NodeJS", "OrderedCollections", "Pkg", "Random"]
-git-tree-sha1 = "5491535a52546c1b76ca39dae7b7c97fef5d6e93"
+git-tree-sha1 = "01acc7748f2f89f93b89a3cf0abe58953a6ab032"
 uuid = "713c75ef-9fc9-4b05-94a9-213340da978e"
-version = "0.6.5"
+version = "0.7.3"
 
 [[FranklinTemplates]]
-git-tree-sha1 = "77313279fc485e082b1fddd289066805a900c23a"
+git-tree-sha1 = "c622f46a2c471985b835b7c3ba21cf5b46f6298e"
 uuid = "3a985190-f512-4703-8d38-2a7944ed5916"
-version = "0.5.5"
+version = "0.6.0"
 
 [[FreeType2_jll]]
 deps = ["Bzip2_jll", "Libdl", "Pkg", "Zlib_jll"]
-git-tree-sha1 = "8e290780d75bc0f676548c3bb84c153f83d14bdc"
+git-tree-sha1 = "7d900f32a3788d4eacac2bfa3bf5c770179c8afd"
 uuid = "d7e528f0-a631-5988-bf34-fe36492bcfd7"
-version = "2.10.1+1"
+version = "2.10.1+2"
 
 [[FriBidi_jll]]
 deps = ["Libdl", "Pkg"]
@@ -328,15 +339,15 @@ uuid = "9fa8497b-333b-5362-9e8d-4d0656e87820"
 
 [[GLM]]
 deps = ["Distributions", "LinearAlgebra", "Printf", "Random", "Reexport", "SparseArrays", "SpecialFunctions", "Statistics", "StatsBase", "StatsFuns", "StatsModels"]
-git-tree-sha1 = "6666bd8181b2f4cb5347001e8d8ef453c50de5b0"
+git-tree-sha1 = "db0ace36f9dbe7b6a7a08434c5921377e9df2c72"
 uuid = "38e38edf-8417-5370-95a0-9cbb8c7f171a"
-version = "1.3.7"
+version = "1.3.9"
 
 [[GR]]
 deps = ["Base64", "DelimitedFiles", "LinearAlgebra", "Printf", "Random", "Serialization", "Sockets", "Test", "UUIDs"]
-git-tree-sha1 = "41dd1395d4dc559f1c2cb558cba784ef37b561fe"
+git-tree-sha1 = "7ea6f715b7caa10d7ee16f1cfcd12f3ccc74116a"
 uuid = "28b8d3ca-fb5f-59d9-8090-bfdbd6d07a71"
-version = "0.47.0"
+version = "0.48.0"
 
 [[GaussianMixtures]]
 deps = ["Arpack", "Clustering", "Compat", "DelimitedFiles", "Distributed", "Distributions", "FileIO", "JLD2", "LinearAlgebra", "Logging", "PDMats", "Printf", "RDatasets", "Random", "ScikitLearnBase", "SpecialFunctions", "Statistics", "StatsBase", "Test"]
@@ -346,21 +357,21 @@ version = "0.3.1"
 
 [[GaussianProcesses]]
 deps = ["Distances", "Distributions", "Documenter", "ElasticArrays", "ElasticPDMats", "FastGaussQuadrature", "ForwardDiff", "LinearAlgebra", "Optim", "PDMats", "Printf", "ProgressMeter", "Random", "RecipesBase", "ScikitLearnBase", "SpecialFunctions", "StaticArrays", "Statistics", "StatsFuns", "Zygote"]
-git-tree-sha1 = "105c668971f973b0f1b84931b0d68b94da78e692"
+git-tree-sha1 = "78a9285fecbeee4849023f1f1906db9fd765d768"
 uuid = "891a1506-143c-57d2-908e-e1f8e92e6de9"
-version = "0.11.2"
+version = "0.12.0"
 
 [[GeometryTypes]]
 deps = ["ColorTypes", "FixedPointNumbers", "LinearAlgebra", "StaticArrays"]
-git-tree-sha1 = "480f30bd8e67240636e6d64e062c83745ee45b88"
+git-tree-sha1 = "96fd99cf83b1952a7d8cb54f4c585a648275805a"
 uuid = "4d00f742-c7ba-57c2-abde-4428a4b178cb"
-version = "0.7.9"
+version = "0.8.2"
 
 [[HTTP]]
 deps = ["Base64", "Dates", "IniFile", "MbedTLS", "Sockets"]
-git-tree-sha1 = "8d9bdd55c9d0d6ddf08f8b5229f90b7f274b6777"
+git-tree-sha1 = "fe31f4ff144392ad8176f5c7c03cca6ba320271c"
 uuid = "cd3eb016-35fb-5094-929b-558a96fad6f3"
-version = "0.8.12"
+version = "0.8.14"
 
 [[IRTools]]
 deps = ["InteractiveUtils", "MacroTools", "Test"]
@@ -386,9 +397,9 @@ uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
 
 [[Interpolations]]
 deps = ["AxisAlgorithms", "LinearAlgebra", "OffsetArrays", "Random", "Ratios", "SharedArrays", "SparseArrays", "StaticArrays", "WoodburyMatrices"]
-git-tree-sha1 = "f5bf159a7705e2a705b0effa1be0c3d18e288fe1"
+git-tree-sha1 = "3af735234d9b1ff9ff1af89875735cd9549c0c5f"
 uuid = "a98d9a8b-a2ab-59e6-89dd-64a1c18fca59"
-version = "0.12.5"
+version = "0.12.9"
 
 [[InvertedIndices]]
 deps = ["Test"]
@@ -402,10 +413,10 @@ uuid = "c8e1da08-722c-5040-9ed9-7db0dc04731e"
 version = "1.3.0"
 
 [[IterativeSolvers]]
-deps = ["LinearAlgebra", "Printf", "Random", "RecipesBase", "SparseArrays", "Test"]
-git-tree-sha1 = "5687f68018b4f14c0da54d402bb23eecaec17f37"
+deps = ["LinearAlgebra", "Printf", "Random", "RecipesBase", "SparseArrays"]
+git-tree-sha1 = "3b7e2aac8c94444947facea7cc7ca91c49169be0"
 uuid = "42fd0dbc-a981-5370-80f2-aaf504508153"
-version = "0.8.1"
+version = "0.8.4"
 
 [[IteratorInterfaceExtensions]]
 git-tree-sha1 = "a3f24677c21f5bbe9d2a714f95dcd58337fb2856"
@@ -418,6 +429,12 @@ git-tree-sha1 = "d6cfa7c24e27d7eaa2290372739c8298257dae16"
 uuid = "033835bb-8acc-5ee8-8aae-3f567f8a3819"
 version = "0.1.12"
 
+[[JLSO]]
+deps = ["BSON", "CodecZlib", "FilePathsBase", "Memento", "Pkg", "Serialization"]
+git-tree-sha1 = "250ffc4f6e9c7c38f5e96fe45218ea77ec50635d"
+uuid = "9da8a3cd-07a3-59c0-a743-3fdc52c30d11"
+version = "2.3.1"
+
 [[JSON]]
 deps = ["Dates", "Mmap", "Parsers", "Unicode"]
 git-tree-sha1 = "b34d7cef7b337321e97d22242c3c2b91f476748e"
@@ -474,9 +491,9 @@ uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
 
 [[Libiconv_jll]]
 deps = ["Libdl", "Pkg"]
-git-tree-sha1 = "802f5b23c846cb4ed568cae0bfb0ce0d2ba1926d"
+git-tree-sha1 = "e5256a3b0ebc710dbd6da0c0b212164a3681037f"
 uuid = "94ce4f54-9a6c-5748-9c1c-f9c7231a4531"
-version = "1.16.0+1"
+version = "1.16.0+2"
 
 [[LineSearches]]
 deps = ["LinearAlgebra", "NLSolversBase", "NaNMath", "Parameters", "Printf", "Test"]
@@ -496,9 +513,9 @@ version = "2.6.1"
 
 [[Literate]]
 deps = ["Base64", "JSON", "REPL"]
-git-tree-sha1 = "82a49cc6c1a38980c537edef7f9998a1843b441d"
+git-tree-sha1 = "ac48e6b189a3e993788e1776485625bcbed3504d"
 uuid = "98b081ad-f1c9-55d3-8b20-4c87d4299306"
-version = "2.3.0"
+version = "2.3.1"
 
 [[LiveServer]]
 deps = ["Crayons", "Documenter", "FileWatching", "HTTP", "Pkg", "Sockets", "Test"]
@@ -523,51 +540,51 @@ version = "2019.0.117+2"
 
 [[MLJ]]
 deps = ["CategoricalArrays", "ComputationalResources", "Distributed", "Distributions", "LinearAlgebra", "MLJBase", "MLJModels", "MLJScientificTypes", "MLJTuning", "Pkg", "ProgressMeter", "Random", "Statistics", "StatsBase", "Tables"]
-git-tree-sha1 = "0ed283eb8b63d7ae5b37b30ca28c0d9f59a0b8ca"
+git-tree-sha1 = "bdf59a5bbb6da10dea1c265d6f06fdb83e6c73a5"
 uuid = "add582a8-e3ab-11e8-2d5e-e98b27df1bc7"
-version = "0.9.2"
+version = "0.10.3"
 
 [[MLJBase]]
-deps = ["CategoricalArrays", "ComputationalResources", "DelimitedFiles", "Distributed", "Distributions", "HTTP", "InteractiveUtils", "InvertedIndices", "JSON", "LinearAlgebra", "LossFunctions", "MLJModelInterface", "MLJScientificTypes", "Missings", "OrderedCollections", "Parameters", "PrettyTables", "ProgressMeter", "Random", "ScientificTypes", "Statistics", "StatsBase", "Tables"]
-git-tree-sha1 = "8e7a07ba6a2322b1c2b1e33f49faaaf4dde6cce5"
+deps = ["CategoricalArrays", "ComputationalResources", "Dates", "DelimitedFiles", "Distributed", "Distributions", "HTTP", "InteractiveUtils", "InvertedIndices", "JLSO", "JSON", "LinearAlgebra", "LossFunctions", "MLJModelInterface", "MLJScientificTypes", "Missings", "OrderedCollections", "Parameters", "PrettyTables", "ProgressMeter", "Random", "ScientificTypes", "Statistics", "StatsBase", "Tables"]
+git-tree-sha1 = "a393f3e1efc149e964daf1641f7743f6c870c834"
 uuid = "a7f614a8-145f-11e9-1d2a-a57a1082229d"
-version = "0.11.9"
+version = "0.12.8"
 
 [[MLJLinearModels]]
 deps = ["DocStringExtensions", "IterativeSolvers", "LinearAlgebra", "LinearMaps", "MLJModelInterface", "Optim", "Parameters"]
-git-tree-sha1 = "69782417b7812df9fbae888111e5308246e30a35"
+git-tree-sha1 = "f97c053f1dba2e80c4ab6f3c53cf64cca33146e3"
 uuid = "6ee0df7b-362f-4a72-a706-9e79364fb692"
-version = "0.3.1"
+version = "0.3.2"
 
 [[MLJModelInterface]]
-deps = ["ScientificTypes"]
-git-tree-sha1 = "fb026cc5d02195c391e4e50f53302f87b736f83b"
+deps = ["Random", "ScientificTypes"]
+git-tree-sha1 = "fc3b93e1905cc86c37bb0efc57ff26669a956bcb"
 uuid = "e80e1ace-859a-464e-9ed9-23947d8ae3ea"
-version = "0.1.8"
+version = "0.2.1"
 
 [[MLJModels]]
-deps = ["CategoricalArrays", "Compat", "Distances", "Distributions", "InteractiveUtils", "LinearAlgebra", "MLJBase", "MLJModelInterface", "MultivariateStats", "OrderedCollections", "Parameters", "Pkg", "Random", "Requires", "ScientificTypes", "Statistics", "StatsBase", "Tables"]
-git-tree-sha1 = "a3ec3c571cc77a74b5fda19281dd8997ea9146f2"
+deps = ["CategoricalArrays", "Dates", "Distances", "Distributions", "InteractiveUtils", "LinearAlgebra", "MLJBase", "MLJModelInterface", "MultivariateStats", "OrderedCollections", "Parameters", "Pkg", "Random", "Requires", "ScientificTypes", "Statistics", "StatsBase", "Tables"]
+git-tree-sha1 = "64932df6c71608f4c6663dc1734a0e0f4ceb5839"
 uuid = "d491faf4-2d78-11e9-2867-c94bc002c0b7"
-version = "0.8.2"
+version = "0.9.4"
 
 [[MLJScientificTypes]]
 deps = ["CategoricalArrays", "ColorTypes", "PrettyTables", "ScientificTypes", "Tables"]
-git-tree-sha1 = "6323b656a470e4b36cdc8170fb165aa961cf3ca1"
+git-tree-sha1 = "6adfbd10b6bd353e3efcc585f44f551b7b75d60b"
 uuid = "2e2323e0-db8b-457b-ae0d-bdfb3bc63afd"
-version = "0.2.1"
+version = "0.2.4"
 
 [[MLJTuning]]
-deps = ["ComputationalResources", "Distributed", "MLJBase", "Random", "RecipesBase"]
-git-tree-sha1 = "df5bc120067d54f5cce9eef286ebcf2b1aaa9412"
+deps = ["ComputationalResources", "Distributed", "Distributions", "MLJBase", "MLJModelInterface", "Random", "RecipesBase"]
+git-tree-sha1 = "05d8530707c381a2464f2ff2f5faa14b0ee3e814"
 uuid = "03970b2e-30c4-11ea-3135-d1576263f10f"
-version = "0.1.4"
+version = "0.3.2"
 
 [[MacroTools]]
-deps = ["DataStructures", "Markdown", "Random"]
-git-tree-sha1 = "07ee65e03e28ca88bc9a338a3726ae0c3efaa94b"
+deps = ["Markdown", "Random"]
+git-tree-sha1 = "f7d2e3f654af75f01ec49be82c231c382214223a"
 uuid = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09"
-version = "0.5.4"
+version = "0.5.5"
 
 [[Markdown]]
 deps = ["Base64"]
@@ -575,9 +592,9 @@ uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"
 
 [[MbedTLS]]
 deps = ["Dates", "MbedTLS_jll", "Random", "Sockets"]
-git-tree-sha1 = "709797fadd2d3b7e3f040a9f6e12726a6d6d2bf5"
+git-tree-sha1 = "426a6978b03a97ceb7ead77775a1da066343ec6e"
 uuid = "739be429-bea8-5141-9913-cc70e7f3736d"
-version = "1.0.0"
+version = "1.0.2"
 
 [[MbedTLS_jll]]
 deps = ["Libdl", "Pkg"]
@@ -590,6 +607,12 @@ git-tree-sha1 = "e498ddeee6f9fdb4551ce855a46f54dbd900245f"
 uuid = "442fdcdd-2543-5da2-b0f3-8c86c306513e"
 version = "0.3.1"
 
+[[Memento]]
+deps = ["Dates", "Distributed", "JSON", "Serialization", "Sockets", "Syslogs", "Test", "TimeZones", "UUIDs"]
+git-tree-sha1 = "5b0f65a76a45d1e9a28f56c5c82743e4d0eecbe9"
+uuid = "f28f55f0-a522-5efc-85c2-fe41dfb9b2d9"
+version = "1.0.0"
+
 [[Missings]]
 deps = ["DataAPI"]
 git-tree-sha1 = "de0a5ce9e5289f27df672ffabef4d1e5861247d5"
@@ -625,9 +648,9 @@ version = "7.6.1"
 
 [[NNlib]]
 deps = ["BinaryProvider", "Libdl", "LinearAlgebra", "Requires", "Statistics"]
-git-tree-sha1 = "755c0bab3912ff782167e1b4b774b833f8a0e550"
+git-tree-sha1 = "d9f196d911f55aeaff11b11f681b135980783824"
 uuid = "872c559c-99b0-510c-b3b7-b6c96a88d5cd"
-version = "0.6.4"
+version = "0.6.6"
 
 [[NaNMath]]
 git-tree-sha1 = "928b8ca9b2791081dc71a51c55347c27c618760f"
@@ -647,15 +670,14 @@ uuid = "2bd173c7-0d6d-553b-b6af-13a54713934c"
 version = "1.1.1"
 
 [[Observables]]
-deps = ["Test"]
-git-tree-sha1 = "dc02cec22747d1d10d9f70d8a1c03432b5bfbcd0"
+git-tree-sha1 = "11832878355305984235a2e90d0e3737383c634c"
 uuid = "510215fc-4207-5dde-b226-833fc4488ee2"
-version = "0.2.3"
+version = "0.3.1"
 
 [[OffsetArrays]]
-git-tree-sha1 = "707e34562700b81e8aa13548eb6b23b18112e49b"
+git-tree-sha1 = "930db8ef90483570107f2396b1ffc6680f08e8b7"
 uuid = "6fe1bfb0-de20-5000-8ca7-80f57d26f881"
-version = "1.0.2"
+version = "1.0.4"
 
 [[Ogg_jll]]
 deps = ["Libdl", "Pkg"]
@@ -664,28 +686,28 @@ uuid = "e7412a2a-1a6e-54c0-be00-318e2571c051"
 version = "1.3.3+0"
 
 [[OpenBLAS_jll]]
-deps = ["Libdl", "Pkg"]
-git-tree-sha1 = "adc45e596df7007d48bf6829efb1dc64fdec3ddc"
+deps = ["CompilerSupportLibraries_jll", "Libdl", "Pkg"]
+git-tree-sha1 = "2ee3e636e94b9fd95fa8364d5cba2e20dae16609"
 uuid = "4536629a-c528-5b80-bd46-f80d51c5b363"
-version = "0.3.7+6"
+version = "0.3.9+2"
 
 [[OpenSSL_jll]]
 deps = ["Libdl", "Pkg"]
-git-tree-sha1 = "33661eb9d5484220b4367d067f499b30bafc9c12"
+git-tree-sha1 = "d2a6f25262d568b5a7e454cf7ff5066a79d16c7d"
 uuid = "458c3c95-2e84-50aa-8efc-19380b2a3a95"
-version = "1.1.1+1"
+version = "1.1.1+2"
 
 [[OpenSpecFun_jll]]
 deps = ["CompilerSupportLibraries_jll", "Libdl", "Pkg"]
-git-tree-sha1 = "d110040968b9afe95c6bd9c6233570b0fe8abd22"
+git-tree-sha1 = "d51c416559217d974a1113522d5919235ae67a87"
 uuid = "efe28fd5-8261-553b-a9e1-b2916fc3738e"
-version = "0.5.3+2"
+version = "0.5.3+3"
 
 [[Optim]]
-deps = ["FillArrays", "LineSearches", "LinearAlgebra", "NLSolversBase", "NaNMath", "Parameters", "PositiveFactorizations", "Printf", "SparseArrays", "StatsBase"]
-git-tree-sha1 = "08f170ff0dcf07f4edb567020fcab47f415da207"
+deps = ["Compat", "FillArrays", "LineSearches", "LinearAlgebra", "NLSolversBase", "NaNMath", "Parameters", "PositiveFactorizations", "Printf", "SparseArrays", "StatsBase"]
+git-tree-sha1 = "62054d469d3631960e3f472ceb8624be5b11c34d"
 uuid = "429524aa-4258-5aef-a3af-852621145aeb"
-version = "0.20.1"
+version = "0.20.6"
 
 [[Opus_jll]]
 deps = ["Libdl", "Pkg"]
@@ -701,9 +723,9 @@ version = "1.1.0"
 
 [[PDMats]]
 deps = ["Arpack", "LinearAlgebra", "SparseArrays", "SuiteSparse", "Test"]
-git-tree-sha1 = "5f303510529486bb02ac4d70da8295da38302194"
+git-tree-sha1 = "2fc6f50ddd959e462f0a2dbc802ddf2a539c6e35"
 uuid = "90014a1f-27ba-587c-ab20-58faa44d9150"
-version = "0.9.11"
+version = "0.9.12"
 
 [[Parameters]]
 deps = ["OrderedCollections"]
@@ -713,9 +735,9 @@ version = "0.12.0"
 
 [[Parsers]]
 deps = ["Dates", "Test"]
-git-tree-sha1 = "d112c19ccca00924d5d3a38b11ae2b4b268dda39"
+git-tree-sha1 = "75d07cb840c300084634b4991761886d0d762724"
 uuid = "69de0a69-1ddd-5017-9359-2bf0b02dc9f0"
-version = "0.3.11"
+version = "1.0.1"
 
 [[Pkg]]
 deps = ["Dates", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "UUIDs"]
@@ -723,21 +745,21 @@ uuid = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 
 [[PlotThemes]]
 deps = ["PlotUtils", "Requires", "Statistics"]
-git-tree-sha1 = "df772cc7c78862da96af1ee85cd0111c6640e44e"
+git-tree-sha1 = "87a4ea7f8c350d87d3a8ca9052663b633c0b2722"
 uuid = "ccf2f8ad-2431-5c83-bf29-c5338b663b6a"
-version = "1.0.1"
+version = "1.0.3"
 
 [[PlotUtils]]
 deps = ["Colors", "Dates", "Printf", "Random", "Reexport"]
-git-tree-sha1 = "a146cb72ec962aec81d478de49d1011db06dd754"
+git-tree-sha1 = "51e742162c97d35f714f9611619db6975e19384b"
 uuid = "995b91a9-d308-5afd-9ec6-746e21dbc043"
-version = "0.6.3"
+version = "0.6.5"
 
 [[Plots]]
 deps = ["Base64", "Contour", "Dates", "FFMPEG", "FixedPointNumbers", "GR", "GeometryTypes", "JSON", "LinearAlgebra", "Measures", "NaNMath", "Pkg", "PlotThemes", "PlotUtils", "Printf", "REPL", "Random", "RecipesBase", "Reexport", "Requires", "Showoff", "SparseArrays", "Statistics", "StatsBase", "UUIDs"]
-git-tree-sha1 = "305a6ceea7c6bf063fce224e4bcc0e0e6ce10ced"
+git-tree-sha1 = "f226ff9b8e391f6a10891563c370aae8beb5d792"
 uuid = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
-version = "0.29.3"
+version = "0.29.9"
 
 [[PooledArrays]]
 deps = ["DataAPI"]
@@ -758,9 +780,9 @@ version = "0.2.0"
 
 [[PrettyTables]]
 deps = ["Crayons", "Formatting", "Parameters", "Reexport", "Tables"]
-git-tree-sha1 = "57b5fc8b9e6d78dea86df4c30b806dd0778c4ee8"
+git-tree-sha1 = "ac3cecc7254adfffb8fdbd2c83eaa247e14b02da"
 uuid = "08abe8d2-0d0c-5749-adfa-8a2ac140af0d"
-version = "0.8.4"
+version = "0.9.0"
 
 [[Printf]]
 deps = ["Unicode"]
@@ -774,15 +796,15 @@ version = "1.2.0"
 
 [[PyCall]]
 deps = ["Conda", "Dates", "Libdl", "LinearAlgebra", "MacroTools", "Serialization", "VersionParsing"]
-git-tree-sha1 = "ce0780857d129208c4e5a6d722486fb40ce11bf8"
+git-tree-sha1 = "3a3fdb9000d35958c9ba2323ca7c4958901f115d"
 uuid = "438e738f-606a-5dbb-bf0a-cddfbfd45ab0"
-version = "1.91.3"
+version = "1.91.4"
 
 [[PyPlot]]
 deps = ["Colors", "LaTeXStrings", "PyCall", "Sockets", "Test", "VersionParsing"]
-git-tree-sha1 = "ccecc72cf5b41a5de686bd76999040050a8a3472"
+git-tree-sha1 = "67dde2482fe1a72ef62ed93f8c239f947638e5a2"
 uuid = "d330b81b-6aea-500a-939a-2ce795aea3ee"
-version = "2.8.2"
+version = "2.9.0"
 
 [[QuadGK]]
 deps = ["DataStructures", "LinearAlgebra"]
@@ -792,15 +814,15 @@ version = "2.3.1"
 
 [[RData]]
 deps = ["CategoricalArrays", "CodecZlib", "DataFrames", "Dates", "FileIO", "Requires", "TimeZones"]
-git-tree-sha1 = "cb2b11bbbb18a4317a1db0ef121626945c1db51e"
+git-tree-sha1 = "820d9bf1ce85f99292656941482faa1e277e7247"
 uuid = "df47a6cb-8c03-5eed-afd8-b6050d6c41da"
-version = "0.6.3"
+version = "0.7.1"
 
 [[RDatasets]]
 deps = ["CSV", "CodecZlib", "DataFrames", "FileIO", "Printf", "RData", "Reexport"]
-git-tree-sha1 = "e2ec04fbd4e4a9129161fe2a5376fb49f8f29e68"
+git-tree-sha1 = "4b5416052f975404c65faada929cb5b571ddca12"
 uuid = "ce6b1742-4840-55fa-b093-852dadbb1d8b"
-version = "0.6.6"
+version = "0.6.7"
 
 [[REPL]]
 deps = ["InteractiveUtils", "Markdown", "Sockets"]
@@ -848,9 +870,9 @@ version = "0.2.2+0"
 uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
 
 [[ScientificTypes]]
-git-tree-sha1 = "9c232034bbee8c53173cdce83787bf8968b09d31"
+git-tree-sha1 = "21e0540206c877f0862f95eecd1e4c8fa852431a"
 uuid = "321657f4-b219-11e9-178b-2701a2544e81"
-version = "0.7.1"
+version = "0.7.2"
 
 [[ScikitLearn]]
 deps = ["Compat", "Conda", "DataFrames", "DecisionTree", "Distributed", "GaussianMixtures", "GaussianProcesses", "IterTools", "LinearAlgebra", "MacroTools", "NBInclude", "Parameters", "Printf", "PyCall", "PyPlot", "RData", "RDatasets", "Random", "ScikitLearnBase", "SparseArrays", "StatsBase"]
@@ -919,9 +941,9 @@ uuid = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [[StatsBase]]
 deps = ["DataAPI", "DataStructures", "LinearAlgebra", "Missings", "Printf", "Random", "SortingAlgorithms", "SparseArrays", "Statistics"]
-git-tree-sha1 = "be5c7d45daa449d12868f4466dbf5882242cf2d9"
+git-tree-sha1 = "19bfcb46245f69ff4013b3df3b977a289852c3a1"
 uuid = "2913bbd2-ae8a-5f71-8c99-4fb6c76f3a91"
-version = "0.32.1"
+version = "0.32.2"
 
 [[StatsFuns]]
 deps = ["Rmath", "SpecialFunctions"]
@@ -930,21 +952,27 @@ uuid = "4c63d2b9-4356-54db-8cca-17b64c39e42c"
 version = "0.9.4"
 
 [[StatsModels]]
-deps = ["CategoricalArrays", "DataStructures", "LinearAlgebra", "ShiftedArrays", "SparseArrays", "StatsBase", "Tables"]
-git-tree-sha1 = "0d0e21a1c3e8043cbc1c4dd4b4e4189b0449e8cf"
+deps = ["DataAPI", "DataStructures", "LinearAlgebra", "ShiftedArrays", "SparseArrays", "StatsBase", "Tables"]
+git-tree-sha1 = "5a140e0bf5d92b2c5c0daa0dcefdadbb57c8a7fb"
 uuid = "3eaba693-59b7-5ba5-a881-562e759f1c8d"
-version = "0.6.6"
+version = "0.6.11"
 
 [[StatsPlots]]
 deps = ["Clustering", "DataStructures", "DataValues", "Distributions", "Interpolations", "KernelDensity", "MultivariateStats", "Observables", "Plots", "RecipesBase", "Reexport", "StatsBase", "TableOperations", "Tables", "Widgets"]
-git-tree-sha1 = "8341b688660c94ca036217f77604277d3f9e1542"
+git-tree-sha1 = "388e6588a1e09e763b0f38c498aeb350b5f76828"
 uuid = "f3b207a7-027a-5e70-b257-86293d7955fd"
-version = "0.14.0"
+version = "0.14.5"
 
 [[SuiteSparse]]
 deps = ["Libdl", "LinearAlgebra", "Serialization", "SparseArrays"]
 uuid = "4607b0f0-06f3-5cda-b6b1-a6196a1729e9"
 
+[[Syslogs]]
+deps = ["Printf", "Sockets"]
+git-tree-sha1 = "46badfcc7c6e74535cc7d833a91f4ac4f805f86d"
+uuid = "cea106d9-e007-5e6c-ad93-58fe2094e9c4"
+version = "0.3.0"
+
 [[TableOperations]]
 deps = ["Tables", "Test"]
 git-tree-sha1 = "208630a14884abd110a8f8008b0882f0d0f5632c"
@@ -959,9 +987,9 @@ version = "1.0.0"
 
 [[Tables]]
 deps = ["DataAPI", "DataValueInterfaces", "IteratorInterfaceExtensions", "LinearAlgebra", "TableTraits", "Test"]
-git-tree-sha1 = "a54b8ce702aa863eced47bade03123d4dca0db84"
+git-tree-sha1 = "c45dcc27331febabc20d86cb3974ef095257dcf3"
 uuid = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
-version = "1.0.2"
+version = "1.0.4"
 
 [[Test]]
 deps = ["Distributed", "InteractiveUtils", "Logging", "Random"]
@@ -1005,33 +1033,39 @@ version = "0.6.2"
 
 [[WoodburyMatrices]]
 deps = ["LinearAlgebra", "SparseArrays"]
-git-tree-sha1 = "68f000f67654d07318d734b364a31233e465f49a"
+git-tree-sha1 = "28ffe06d28b1ba8fdb2f36ec7bb079fac81bac0d"
 uuid = "efce3f68-66dc-5838-9240-27a6d6f5f9b6"
-version = "0.5.1"
+version = "0.5.2"
 
 [[XGBoost]]
-deps = ["BinaryProvider", "Libdl", "Printf", "Random", "SparseArrays", "Statistics", "Test"]
-git-tree-sha1 = "b1299fe4d279e2a5ca67406a5eb640e5f71d19ce"
+deps = ["Libdl", "Printf", "Random", "SparseArrays", "Statistics", "Test", "XGBoost_jll"]
+git-tree-sha1 = "a338138a2d0d0f994e8806494a4c5ba1e94e096d"
 uuid = "009559a3-9522-5dbb-924b-0b6ed2b22bb9"
-version = "0.4.2"
+version = "0.4.3"
+
+[[XGBoost_jll]]
+deps = ["CompilerSupportLibraries_jll", "Libdl", "Pkg"]
+git-tree-sha1 = "977ff466cc5a4d6444076e9b1b488e187cbeb283"
+uuid = "a5c6f535-4255-5ca2-a466-0e519f119c46"
+version = "0.82.0+2"
 
 [[XML2_jll]]
 deps = ["Libdl", "Libiconv_jll", "Pkg", "Zlib_jll"]
-git-tree-sha1 = "ed5603a695aefe3e9e404fc7b052e02cc72cfab6"
+git-tree-sha1 = "987c02a43fa10a491a5f0f7c46a6d3559ed6a8e2"
 uuid = "02c8fc9c-b97f-50b9-bbe4-9be30ff0a78a"
-version = "2.9.9+1"
+version = "2.9.9+4"
 
 [[Zlib_jll]]
 deps = ["Libdl", "Pkg"]
-git-tree-sha1 = "fd36a6739e256527287c5444960d0266712cd49e"
+git-tree-sha1 = "2f6c3e15e20e036ee0a0965879b31442b7ec50fa"
 uuid = "83775a58-1f1d-513f-b197-d71354ab007a"
-version = "1.2.11+8"
+version = "1.2.11+9"
 
 [[Zygote]]
-deps = ["DiffRules", "FFTW", "FillArrays", "ForwardDiff", "IRTools", "InteractiveUtils", "LinearAlgebra", "MacroTools", "NNlib", "NaNMath", "Random", "Requires", "SpecialFunctions", "Statistics", "ZygoteRules"]
-git-tree-sha1 = "54872ae5411c8795ed52852759796a04fb771f68"
+deps = ["AbstractFFTs", "ArrayLayouts", "DiffRules", "FillArrays", "ForwardDiff", "IRTools", "InteractiveUtils", "LinearAlgebra", "MacroTools", "NNlib", "NaNMath", "Random", "Requires", "SpecialFunctions", "Statistics", "ZygoteRules"]
+git-tree-sha1 = "014e1f208bd5b43e26448ca31d971053f58bc20a"
 uuid = "e88e6eb3-aa80-5325-afca-941959d7151f"
-version = "0.4.7"
+version = "0.4.15"
 
 [[ZygoteRules]]
 deps = ["MacroTools"]
@@ -1041,9 +1075,9 @@ version = "0.2.0"
 
 [[libass_jll]]
 deps = ["Bzip2_jll", "FreeType2_jll", "FriBidi_jll", "Libdl", "Pkg", "Zlib_jll"]
-git-tree-sha1 = "3fd3ea3525f2e3d337c54a52b2ca78a5a272bbf5"
+git-tree-sha1 = "d0259e0624e08ae9ebae16c80257caabc25f2048"
 uuid = "0ac62f75-1d6f-5e53-bd7c-93b484bb37c0"
-version = "0.14.0+0"
+version = "0.14.0+1"
 
 [[libfdk_aac_jll]]
 deps = ["Libdl", "Pkg"]
diff --git a/Project.toml b/Project.toml
index a6c10a11..357afef6 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "MLJTutorials"
 uuid = "b22f6415-6e67-485c-b34d-7995e604d9c9"
-version = "0.3.0"
+version = "0.4.0"
 
 [deps]
 CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"
@@ -37,24 +37,29 @@ Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
 XGBoost = "009559a3-9522-5dbb-924b-0b6ed2b22bb9"
 
 [compat]
-CSV = "^0.5"
-CategoricalArrays = "^0.7"
-LossFunctions = "^0.5"
-MLJ = "^0.9"
-MLJBase = "^0.11"
-MLJLinearModels = "^0.3"
-MLJModelInterface = "^0.1"
-MLJModels = "^0.8"
-MLJScientificTypes = "^0.2"
-MultivariateStats = "^0.7"
-NearestNeighbors = "^0.4"
-PrettyPrinting = "^0.2"
-PyPlot = "^2.8"
-RDatasets = "^0.6"
-ScikitLearn = "^0.5"
-StatsBase = "^0.32"
-Tables = "^1.0"
-XGBoost = "^0.4"
+CSV = "0.6"
+CategoricalArrays = "0.7"
+Clustering = "0.14"
+Distances = "0.8"
+Distributions = "0.23"
+GLM = "1.3"
+HTTP = "0.8"
+LIBSVM = "0.4"
+MLJ = "0.10"
+MLJBase = "0.12"
+MLJLinearModels = "0.3"
+MLJModelInterface = "0.2"
+MLJModels = "0.9"
+MLJScientificTypes = "0.2"
+MultivariateStats = "0.7"
+NearestNeighbors = "0.4"
+PrettyPrinting = "0.2"
+PyPlot = "2.9"
+RDatasets = "0.6"
+ScikitLearn = "0.5"
+StatsBase = "0.32"
+Tables = "1"
+XGBoost = "0.4"
 
 [extras]
 Logging = "56ddb016-857b-54e1-b83d-db4d58db5568"
diff --git a/_layout/head.html b/_layout/head.html
index a400cc77..c97bbfb9 100644
--- a/_layout/head.html
+++ b/_layout/head.html
@@ -77,6 +77,7 @@
       <li class="pure-menu-item {{ispage end-to-end/crabs-xgb/index.html}}pure-menu-selected{{end}}"><a href="/end-to-end/crabs-xgb/" class="pure-menu-link"><span style="padding-right:0.5rem;">•</span> Crabs (XGB)</a></li>
       <li class="pure-menu-item "><a href="/end-to-end/horse/" class="pure-menu-link"><span style="padding-right:0.5rem;">•</span> Horse</a></li>
       <li class="pure-menu-item "><a href="/end-to-end/HouseKingCounty/" class="pure-menu-link"><span style="padding-right:0.5rem;">•</span> King County Houses</a></li>
+      <li class="pure-menu-item "><a href="/end-to-end/airfoil" class="pure-menu-link"><span style="padding-right:0.5rem;">•</span> Airfoil </a></li>
     </ul>
   </ul>
   <!-- END OF LIST OF MENU ITEMS -->
diff --git a/_literate/EX-airfoil.jl b/_literate/EX-airfoil.jl
new file mode 100644
index 00000000..0f7c3863
--- /dev/null
+++ b/_literate/EX-airfoil.jl
@@ -0,0 +1,139 @@
+# **Main author**: [Ashrya Agrawal](https://github.com/ashryaagr).
+#
+# ## Getting started
+# Here we use the [UCI "Airfoil Self-Noise" dataset](http://archive.ics.uci.edu/ml/datasets/Airfoil+Self-Noise)
+# ### Loading and  preparing the data
+
+using MLJ, PrettyPrinting, DataFrames, Statistics, CSV
+using PyPlot, HTTP
+
+MLJ.color_off() # hide
+
+req = HTTP.get("https://raw.githubusercontent.com/rupakc/UCI-Data-Analysis/master/Airfoil%20Dataset/airfoil_self_noise.dat");
+
+df = CSV.read(req.body; header=[
+                  "Frequency","Attack_Angle","Chord+Length",
+                  "Free_Velocity","Suction_Side","Scaled_Sound"
+              ]
+       );
+df[1:5, :] |> pretty
+
+#
+
+schema(df)
+
+#-unpack into the data and labels.
+
+y, X = unpack(df, ==(:Scaled_Sound), col -> true);
+
+# Now we Standardize the features using the transformer Standardizer()
+
+X = transform(fit!(machine(Standardizer(), X)), X);
+
+# Partition into train and test set
+
+train, test = partition(eachindex(y), 0.7, shuffle=true);
+
+# Let's first see which models are compatible with the scientific type and machine type of our data
+
+for model in models(matching(X, y))
+       print("Model Name: " , model.name , " , Package: " , model.package_name , "\n")
+end
+
+# Note that if we coerce `X.Frequency` to `Continuous`, many more models are available:
+
+coerce!(X, :Frequency=>Continuous)
+
+for model in models(matching(X, y))
+       print("Model Name: " , model.name , " , Package: " , model.package_name , "\n")
+end
+
+# ## DecisionTreeRegressor
+#
+# We will first try out DecisionTreeRegressor. We load the DecisionTreeRegressor from DecisionTree.jl
+
+dcr = @load DecisionTreeRegressor pkg=DecisionTree
+
+dcrm = machine(dcr, X, y)
+
+fit!(dcrm, rows=train, force=true)
+pred_dcrm = MLJ.predict(dcrm, rows=test);
+
+# Now you can call a loss function to assess the performance on test set.
+
+rms(pred_dcrm, y[test])
+
+# ## RandomForestRegressor
+#
+# Now let's try out RandomForestRegressor. We load the RandomForestRegressor from DecisionTree.jl
+
+rfr = @load RandomForestRegressor pkg=DecisionTree
+
+rfr_m = machine(rfr, X, y);
+
+# train on the rows corresponding to train
+
+fit!(rfr_m, rows=train);
+
+# predict values on the rows corresponding to test
+
+pred_rfr = MLJ.predict(rfr_m, rows=test);
+rms(pred_rfr, y[test])
+
+# Unsurprisingly, the RandomForestRegressor does a better job.
+#
+# Can we do even better? Yeah, we can!! We can make use of Model Tuning.
+#
+# ## Tuning
+#
+# In case you are new to model tuning using MLJ, refer [lab5](https://alan-turing-institute.github.io/MLJTutorials/isl/lab-5/) and [model-tuning](https://alan-turing-institute.github.io/MLJTutorials/getting-started/model-tuning/)
+#
+# Range of values for parameters should be specified to do hyperparameter tuning
+
+r_maxD = range(rfr, :n_trees, lower=9, upper=15)
+r_samF = range(rfr, :sampling_fraction, lower=0.6, upper=0.8)
+r = [r_maxD, r_samF];
+
+# Now we specify how the tuning should be done. Let's just specify a coarse grid tuning with cross validation and instantiate a tuned model:
+
+tuning = Grid(resolution=7)
+resampling = CV(nfolds=6)
+
+tm = TunedModel(model=rfr, tuning=tuning, resampling=resampling, ranges=r, measure=rms)
+
+rfr_tm = machine(tm, X, y);
+
+# train on the rows corresponding to train
+
+fit!(rfr_tm, rows=train);
+
+# predict values on the rows corresponding to test
+
+pred_rfr_tm = MLJ.predict(rfr_tm, rows=test);
+rms(pred_rfr_tm, y[test])
+
+# That was great! We have further improved the accuracy
+#
+# Now to retrieve best model, You can use
+
+fitted_params(rfr_tm).best_model
+
+# Now we can investigate the tuning by using report.
+# Let's plot a heatmap of the measurements:
+
+r = report(rfr_tm)
+res = r.plotting
+
+md = res.parameter_values[:,1]
+mcw = res.parameter_values[:,2]
+
+figure(figsize=(8,6))
+tricontourf(md, mcw, res.measurements)
+
+xlabel("Number of trees", fontsize=14)
+ylabel("Sampling fraction", fontsize=14)
+xticks(9:1:15, fontsize=12)
+yticks(fontsize=12)
+plt.savefig(joinpath(@OUTPUT, "airfoil_heatmap.svg")) # hide
+
+# \figalt{Hyperparameter heatmap}{airfoil_heatmap.svg}
diff --git a/end-to-end/airfoil.md b/end-to-end/airfoil.md
new file mode 100644
index 00000000..35d0c833
--- /dev/null
+++ b/end-to-end/airfoil.md
@@ -0,0 +1,6 @@
+@def hascode = true
+@def showall = true
+
+# Airfoil
+
+\tutorial{EX-airfoil}