diff --git a/gaussian_process/gpr.go b/gaussian_process/gpr.go index 2e770ff..d540063 100644 --- a/gaussian_process/gpr.go +++ b/gaussian_process/gpr.go @@ -8,7 +8,8 @@ import ( "gonum.org/v1/gonum/blas" "gonum.org/v1/gonum/blas/blas64" "gonum.org/v1/gonum/mat" - "gorgonia.org/tensor" + // "gorgonia.org/tensor" + "github.com/pa-m/sklearn/gaussian_process/tensor" "math" ) diff --git a/gaussian_process/kernels/kernels.go b/gaussian_process/kernels/kernels.go index b120cb3..9302e93 100644 --- a/gaussian_process/kernels/kernels.go +++ b/gaussian_process/kernels/kernels.go @@ -8,7 +8,8 @@ import ( "gonum.org/v1/gonum/floats" "gonum.org/v1/gonum/mat" - t "gorgonia.org/tensor" + //t "gorgonia.org/tensor" + t "github.com/pa-m/sklearn/gaussian_process/tensor" ) // hyperparameter specification diff --git a/gaussian_process/kernels/kernels_test.go b/gaussian_process/kernels/kernels_test.go index 608f4c5..97229c3 100644 --- a/gaussian_process/kernels/kernels_test.go +++ b/gaussian_process/kernels/kernels_test.go @@ -11,7 +11,8 @@ import ( "gonum.org/v1/gonum/mat" "github.com/pa-m/randomkit" - "gorgonia.org/tensor" + //"gorgonia.org/tensor" + "github.com/pa-m/sklearn/gaussian_process/tensor" ) var _ = []Kernel{&ConstantKernel{}, &WhiteKernel{}, &RBF{}, &DotProduct{}, &Sum{}, &Product{}, &Exponentiation{}} diff --git a/gaussian_process/kernels/matutil.go b/gaussian_process/kernels/matutil.go index bab0f0f..6147008 100644 --- a/gaussian_process/kernels/matutil.go +++ b/gaussian_process/kernels/matutil.go @@ -3,7 +3,8 @@ package kernels import ( "fmt" "gonum.org/v1/gonum/mat" - "gorgonia.org/tensor" + //"gorgonia.org/tensor" + "github.com/pa-m/sklearn/gaussian_process/tensor" "math" ) diff --git a/gaussian_process/tensor/tensor.go b/gaussian_process/tensor/tensor.go new file mode 100644 index 0000000..416720a --- /dev/null +++ b/gaussian_process/tensor/tensor.go @@ -0,0 +1,119 @@ +// very simplified tensor with interface compatible with gorgonia.org/tensor +package tensor + +import ( + "errors" + "reflect" +) + +// Dtype is tensor element type +type Dtype = reflect.Kind + +// Float64 is element type +var Float64 = reflect.Float64 + +type Shape []int + +// Dense is a dense tensor +type Dense struct { + dtype Dtype + shape []int + strides []int + data interface{} +} + +// Tensor is the minimal interface for tensor +type Tensor interface { + Shape() Shape + At(args ...int) (interface{}, error) +} + +// Iterator is the interface for tensor iterator +type Iterator interface { + Start() (int, error) + Next() (int, error) +} + +// Option can be passed to NewDense ex: WithBacking +type Option func(t *Dense) + +// EndReachedError is returned by iterator when at ane +var EndReachedError = errors.New("at end") + +// IndexError is returned by At when out of bounds +var IndexError = errors.New("index out of bounds") + +// DenseIterator is returned by Dense.Iterator +type DenseIterator struct { + t *Dense + index int +} + +// Start returns 0 +func (it *DenseIterator) Start() (i int, e error) { + i = it.index + if i >= len(it.t.data.([]float64)) { + e = EndReachedError + } + it.index++ + return i, e +} + +// Next return current index and advance +func (it *DenseIterator) Next() (i int, e error) { + i = it.index + if i >= len(it.t.data.([]float64)) { + e = EndReachedError + } + it.index++ + return i, e +} + +// Dtype returns element type +func (t *Dense) Dtype() Dtype { return t.dtype } + +// Shape returns dimensions extend +func (t *Dense) Shape() Shape { return t.shape } + +// At returns one element +func (t *Dense) At(args ...int) (v interface{}, e error) { + var pos int + for dim, index := range args { + if index < 0 || index >= t.shape[dim] { + return nil, IndexError + } + pos += index * t.strides[dim] + } + data := t.data.([]float64) + + return data[pos], nil +} + +// Strides returns position-shift per dimension +func (t *Dense) Strides() []int { return t.strides } + +// Data returns underlying data +func (t *Dense) Data() interface{} { return t.data } + +// Iterator returns a flat iterator +func (t *Dense) Iterator() Iterator { return &DenseIterator{t: t} } +func NewDense(ty Dtype, s Shape, args ...Option) *Dense { + st := make(Shape, len(s)) + sz := 1 + for i := range s { + j := len(s) - 1 - i + st[j] = sz + sz *= s[j] + } + t := &Dense{dtype: ty, shape: s, strides: st} + for _, o := range args { + o(t) + } + if t.data == nil { + t.data = make([]float64, sz) + } + return t +} + +// WithBacking binds an existing storage to tensor +func WithBacking(data []float64) Option { return func(t *Dense) { t.data = data } } diff --git a/go.mod b/go.mod index 4ad5fa5..a27c1a7 100644 --- a/go.mod +++ b/go.mod @@ -3,19 +3,15 @@ module github.com/pa-m/sklearn require ( github.com/ajstarks/svgo v0.0.0-20190826172357-de52242f3d65 // indirect github.com/chewxy/math32 v1.0.4 - github.com/davecgh/go-spew v1.1.1 // indirect github.com/fogleman/gg v1.3.0 // indirect github.com/jung-kurt/gofpdf v1.10.1 // indirect - github.com/kr/pretty v0.1.0 // indirect github.com/pa-m/optimize v0.0.0-20190612075243-15ee852a6d9a github.com/pa-m/randomkit v0.0.0-20191001073902-db4fd80633df - github.com/pkg/errors v0.9.0 + github.com/pkg/errors v0.9.1 golang.org/x/exp v0.0.0-20191129062945-2f5052295587 - golang.org/x/tools v0.0.0-20191204193430-660eba4da30b // indirect + golang.org/x/tools v0.0.0-20200225230052-807dcd883420 // indirect gonum.org/v1/gonum v0.6.1 gonum.org/v1/plot v0.0.0-20190615073203-9aa86143727f - gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect - gorgonia.org/tensor v0.9.1 ) go 1.13 diff --git a/go.sum b/go.sum index e9bedff..eaf5eb4 100644 --- a/go.sum +++ b/go.sum @@ -6,71 +6,42 @@ github.com/ajstarks/svgo v0.0.0-20180226025133-644b8db467af/go.mod h1:K08gAheRH3 github.com/ajstarks/svgo v0.0.0-20190826172357-de52242f3d65 h1:kZegOsPGxfV9mM8WzfllNZOx3MvM5zItmhQlvITKVvA= github.com/ajstarks/svgo v0.0.0-20190826172357-de52242f3d65/go.mod h1:K08gAheRH3/J6wwsYMMT4xOr94bZjxIelGM0+d/wbFw= github.com/boombuler/barcode v1.0.0/go.mod h1:paBWMcWSl3LHKBqUq+rly7CNSldXjb2rDl3JlRe0mD8= -github.com/chewxy/hm v1.0.0 h1:zy/TSv3LV2nD3dwUEQL2VhXeoXbb9QkpmdRAVUFiA6k= -github.com/chewxy/hm v1.0.0/go.mod h1:qg9YI4q6Fkj/whwHR1D+bOGeF7SniIP40VweVepLjg0= -github.com/chewxy/math32 v1.0.0 h1:RTt2SACA7BTzvbsAKVQJLZpV6zY2MZw4bW9L2HEKkHg= -github.com/chewxy/math32 v1.0.0/go.mod h1:Miac6hA1ohdDUTagnvJy/q+aNnEk16qWUdb8ZVhvCN0= github.com/chewxy/math32 v1.0.4 h1:dfqy3+BbCmet2zCkaDaIQv9fpMxnmYYlAEV2Iqe3DZo= github.com/chewxy/math32 v1.0.4/go.mod h1:dOB2rcuFrCn6UHrze36WSLVPKtzPMRAQvBvUwkSsLqs= github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8= github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= -github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= -github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/fogleman/gg v1.2.1-0.20190220221249-0403632d5b90/go.mod h1:R/bRT+9gY/C5z7JzPU0zXsXHKM4/ayA+zqcVNZzPa1k= github.com/fogleman/gg v1.3.0 h1:/7zJX8F6AaYQc57WQCyN9cAIz+4bCJGO9B+dyW29am8= github.com/fogleman/gg v1.3.0/go.mod h1:R/bRT+9gY/C5z7JzPU0zXsXHKM4/ayA+zqcVNZzPa1k= -github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU= github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8= -github.com/gogo/protobuf v1.3.0 h1:G8O7TerXerS4F6sx9OV7/nRfJdnXgHZu/S/7F2SN+UE= -github.com/gogo/protobuf v1.3.0/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o= github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g= github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k= -github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs= 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h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo= github.com/ruudk/golang-pdf417 v0.0.0-20181029194003-1af4ab5afa58/go.mod h1:6lfFZQK844Gfx8o5WFuvpxWRwnSoipWe/p622j1v06w= -github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= -github.com/stretchr/testify v1.1.4/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs= github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w= github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs= -github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk= -github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4= -github.com/xtgo/set v1.0.0 h1:6BCNBRv3ORNDQ7fyoJXRv+tstJz3m1JVFQErfeZz2pY= -github.com/xtgo/set v1.0.0/go.mod h1:d3NHzGzSa0NmB2NhFyECA+QdRp29oEn2xbT+TpeFoM8= golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M= golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= golang.org/x/crypto v0.0.0-20190829043050-9756ffdc2472/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= -golang.org/x/crypto v0.0.0-20190927123631-a832865fa7ad/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= +golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= golang.org/x/exp v0.0.0-20180321215751-8460e604b9de h1:xSjD6HQTqT0H/k60N5yYBtnN1OEkVy7WIo/DYyxKRO0= golang.org/x/exp v0.0.0-20180321215751-8460e604b9de/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA= golang.org/x/exp v0.0.0-20180807140117-3d87b88a115f h1:9kQ594xxPWRNKfTOnPjPcgrIJ19zM3ic57aI7PbMyAA= @@ -97,35 +68,30 @@ golang.org/x/image 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