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dense_matop_test.go
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dense_matop_test.go
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package tensor
import (
"fmt"
"testing"
"github.com/stretchr/testify/assert"
"gorgonia.org/vecf64"
)
func cloneArray(a interface{}) interface{} {
switch at := a.(type) {
case []float64:
retVal := make([]float64, len(at))
copy(retVal, at)
return retVal
case []float32:
retVal := make([]float32, len(at))
copy(retVal, at)
return retVal
case []int:
retVal := make([]int, len(at))
copy(retVal, at)
return retVal
case []int64:
retVal := make([]int64, len(at))
copy(retVal, at)
return retVal
case []int32:
retVal := make([]int32, len(at))
copy(retVal, at)
return retVal
case []byte:
retVal := make([]byte, len(at))
copy(retVal, at)
return retVal
case []bool:
retVal := make([]bool, len(at))
copy(retVal, at)
return retVal
}
return nil
}
func castToDt(val float64, dt Dtype) interface{} {
switch dt {
case Bool:
return false
case Int:
return int(val)
case Int8:
return int8(val)
case Int16:
return int16(val)
case Int32:
return int32(val)
case Int64:
return int64(val)
case Uint:
return uint(val)
case Uint8:
return uint8(val)
case Uint16:
return uint16(val)
case Uint32:
return uint32(val)
case Uint64:
return uint64(val)
case Float32:
return float32(val)
case Float64:
return float64(val)
default:
return 0
}
}
var atTests = []struct {
data interface{}
shape Shape
coord []int
correct interface{}
err bool
}{
// matrix
{[]float64{0, 1, 2, 3, 4, 5}, Shape{2, 3}, []int{0, 1}, float64(1), false},
{[]float32{0, 1, 2, 3, 4, 5}, Shape{2, 3}, []int{1, 1}, float32(4), false},
{[]float64{0, 1, 2, 3, 4, 5}, Shape{2, 3}, []int{1, 2, 3}, nil, true},
// 3-tensor
{[]int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23},
Shape{2, 3, 4}, []int{1, 1, 1}, 17, false},
{[]int64{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23},
Shape{2, 3, 4}, []int{1, 2, 3}, int64(23), false},
{[]int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23},
Shape{2, 3, 4}, []int{0, 3, 2}, 23, true},
}
func TestDense_At(t *testing.T) {
for i, ats := range atTests {
T := New(WithShape(ats.shape...), WithBacking(ats.data))
got, err := T.At(ats.coord...)
if checkErr(t, ats.err, err, "At", i) {
continue
}
if got != ats.correct {
t.Errorf("Expected %v. Got %v", ats.correct, got)
}
}
}
func Test_transposeIndex(t *testing.T) {
a := []byte{0, 1, 2, 3}
T := New(WithShape(2, 2), WithBacking(a))
correct := []int{0, 2, 1, 3}
for i, v := range correct {
got := T.transposeIndex(i, []int{1, 0}, []int{2, 1})
if v != got {
t.Errorf("transposeIndex error. Expected %v. Got %v", v, got)
}
}
}
var transposeTests = []struct {
name string
shape Shape
transposeWith []int
data interface{}
correctShape Shape
correctStrides []int // after .T()
correctStrides2 []int // after .Transpose()
correctData interface{}
}{
{"c.T()", Shape{4, 1}, nil, []float64{0, 1, 2, 3},
Shape{1, 4}, []int{1, 1}, []int{4, 1}, []float64{0, 1, 2, 3}},
{"r.T()", Shape{1, 4}, nil, []float32{0, 1, 2, 3},
Shape{4, 1}, []int{1, 1}, []int{1, 1}, []float32{0, 1, 2, 3}},
{"v.T()", Shape{4}, nil, []int{0, 1, 2, 3},
Shape{4}, []int{1}, []int{1}, []int{0, 1, 2, 3}},
{"M.T()", Shape{2, 3}, nil, []int64{0, 1, 2, 3, 4, 5},
Shape{3, 2}, []int{1, 3}, []int{2, 1}, []int64{0, 3, 1, 4, 2, 5}},
{"M.T(0,1) (NOOP)", Shape{2, 3}, []int{0, 1}, []int32{0, 1, 2, 3, 4, 5},
Shape{2, 3}, []int{3, 1}, []int{3, 1}, []int32{0, 1, 2, 3, 4, 5}},
{"3T.T()", Shape{2, 3, 4}, nil,
[]byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23},
Shape{4, 3, 2}, []int{1, 4, 12}, []int{6, 2, 1},
[]byte{0, 12, 4, 16, 8, 20, 1, 13, 5, 17, 9, 21, 2, 14, 6, 18, 10, 22, 3, 15, 7, 19, 11, 23}},
{"3T.T(2, 1, 0) (Same as .T())", Shape{2, 3, 4}, []int{2, 1, 0},
[]int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23},
Shape{4, 3, 2}, []int{1, 4, 12}, []int{6, 2, 1},
[]int{0, 12, 4, 16, 8, 20, 1, 13, 5, 17, 9, 21, 2, 14, 6, 18, 10, 22, 3, 15, 7, 19, 11, 23}},
{"3T.T(2, 1, 0) (Same as .T())", Shape{2, 3, 4}, []int{2, 1, 0},
[]int16{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23},
Shape{4, 3, 2}, []int{1, 4, 12}, []int{6, 2, 1},
[]int16{0, 12, 4, 16, 8, 20, 1, 13, 5, 17, 9, 21, 2, 14, 6, 18, 10, 22, 3, 15, 7, 19, 11, 23}},
{"3T.T(0, 2, 1)", Shape{2, 3, 4}, []int{0, 2, 1},
[]int32{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23},
Shape{2, 4, 3}, []int{12, 1, 4}, []int{12, 3, 1},
[]int32{0, 4, 8, 1, 5, 9, 2, 6, 10, 3, 7, 11, 12, 16, 20, 13, 17, 21, 14, 18, 22, 15, 19, 23}},
{"3T.T{1, 0, 2)", Shape{2, 3, 4}, []int{1, 0, 2},
[]float64{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23},
Shape{3, 2, 4}, []int{4, 12, 1}, []int{8, 4, 1},
[]float64{0, 1, 2, 3, 12, 13, 14, 15, 4, 5, 6, 7, 16, 17, 18, 19, 8, 9, 10, 11, 20, 21, 22, 23}},
{"3T.T{1, 2, 0)", Shape{2, 3, 4}, []int{1, 2, 0},
[]float64{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23},
Shape{3, 4, 2}, []int{4, 1, 12}, []int{8, 2, 1},
[]float64{0, 12, 1, 13, 2, 14, 3, 15, 4, 16, 5, 17, 6, 18, 7, 19, 8, 20, 9, 21, 10, 22, 11, 23}},
{"3T.T{2, 0, 1)", Shape{2, 3, 4}, []int{2, 0, 1},
[]float32{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23},
Shape{4, 2, 3}, []int{1, 12, 4}, []int{6, 3, 1},
[]float32{0, 4, 8, 12, 16, 20, 1, 5, 9, 13, 17, 21, 2, 6, 10, 14, 18, 22, 3, 7, 11, 15, 19, 23}},
{"3T.T{0, 1, 2} (NOOP)", Shape{2, 3, 4}, []int{0, 1, 2},
[]bool{true, false, true, false, true, false, true, false, true, false, true, false, true, false, true, false, true, false, true, false, true, false, true, false},
Shape{2, 3, 4}, []int{12, 4, 1}, []int{12, 4, 1},
[]bool{true, false, true, false, true, false, true, false, true, false, true, false, true, false, true, false, true, false, true, false, true, false, true, false}},
{"M[2,2].T for bools, just for completeness sake", Shape{2, 2}, nil,
[]bool{true, true, false, false},
Shape{2, 2}, []int{1, 2}, []int{2, 1},
[]bool{true, false, true, false},
},
{"M[2,2].T for strings, just for completeness sake", Shape{2, 2}, nil,
[]string{"hello", "world", "今日は", "世界"},
Shape{2, 2}, []int{1, 2}, []int{2, 1},
[]string{"hello", "今日は", "world", "世界"},
},
}
func TestDense_Transpose(t *testing.T) {
assert := assert.New(t)
var err error
// standard transposes
for _, tts := range transposeTests {
T := New(WithShape(tts.shape...), WithBacking(tts.data))
if err = T.T(tts.transposeWith...); err != nil {
t.Errorf("%v - %v", tts.name, err)
continue
}
assert.True(tts.correctShape.Eq(T.Shape()), "Transpose %v Expected shape: %v. Got %v", tts.name, tts.correctShape, T.Shape())
assert.Equal(tts.correctStrides, T.Strides(), "Transpose %v. Expected stride: %v. Got %v", tts.name, tts.correctStrides, T.Strides())
T.Transpose()
assert.True(tts.correctShape.Eq(T.Shape()), "Transpose %v Expected shape: %v. Got %v", tts.name, tts.correctShape, T.Shape())
assert.Equal(tts.correctStrides2, T.Strides(), "Transpose2 %v - Expected stride %v. Got %v", tts.name, tts.correctStrides2, T.Strides())
assert.Equal(tts.correctData, T.Data(), "Transpose %v", tts.name)
}
// test stacked .T() calls
var T *Dense
// column vector
T = New(WithShape(4, 1), WithBacking(Range(Int, 0, 4)))
if err = T.T(); err != nil {
t.Errorf("Stacked .T() #1 for vector. Error: %v", err)
goto matrev
}
if err = T.T(); err != nil {
t.Errorf("Stacked .T() #1 for vector. Error: %v", err)
goto matrev
}
assert.True(T.old.IsZero())
assert.Nil(T.transposeWith)
assert.True(T.IsColVec())
matrev:
// matrix, reversed
T = New(WithShape(2, 3), WithBacking(Range(Byte, 0, 6)))
if err = T.T(); err != nil {
t.Errorf("Stacked .T() #1 for matrix reverse. Error: %v", err)
goto matnorev
}
if err = T.T(); err != nil {
t.Errorf("Stacked .T() #2 for matrix reverse. Error: %v", err)
goto matnorev
}
assert.True(T.old.IsZero())
assert.Nil(T.transposeWith)
assert.True(Shape{2, 3}.Eq(T.Shape()))
matnorev:
// 3-tensor, non reversed
T = New(WithShape(2, 3, 4), WithBacking(Range(Int64, 0, 24)))
if err = T.T(); err != nil {
t.Fatalf("Stacked .T() #1 for tensor with no reverse. Error: %v", err)
}
if err = T.T(2, 0, 1); err != nil {
t.Fatalf("Stacked .T() #2 for tensor with no reverse. Error: %v", err)
}
correctData := []int64{0, 12, 4, 16, 8, 20, 1, 13, 5, 17, 9, 21, 2, 14, 6, 18, 10, 22, 3, 15, 7, 19, 11, 23}
assert.Equal(correctData, T.Data())
assert.Equal([]int{2, 0, 1}, T.transposeWith)
assert.NotNil(T.old)
}
func TestTUT(t *testing.T) {
assert := assert.New(t)
var T *Dense
T = New(Of(Float64), WithShape(2, 3, 4))
T.T()
T.UT()
assert.True(T.old.IsZero())
assert.Nil(T.transposeWith)
T.T(2, 0, 1)
T.UT()
assert.True(T.old.IsZero())
assert.Nil(T.transposeWith)
}
type repeatTest struct {
name string
tensor *Dense
ne bool // should assert tensor not equal
axis int
repeats []int
correct interface{}
shape Shape
err bool
}
var repeatTests = []repeatTest{
{"Scalar Repeat on axis 0", New(FromScalar(true)),
true, 0, []int{3},
[]bool{true, true, true},
Shape{3}, false,
},
{"Scalar Repeat on axis 1", New(FromScalar(byte(255))),
false, 1, []int{3},
[]byte{255, 255, 255},
Shape{1, 3}, false,
},
{"Vector Repeat on axis 0", New(WithShape(2), WithBacking([]int32{1, 2})),
false, 0, []int{3},
[]int32{1, 1, 1, 2, 2, 2},
Shape{6}, false,
},
{"ColVec Repeat on axis 0", New(WithShape(2, 1), WithBacking([]int64{1, 2})),
false, 0, []int{3},
[]int64{1, 1, 1, 2, 2, 2},
Shape{6, 1}, false,
},
{"RowVec Repeat on axis 0", New(WithShape(1, 2), WithBacking([]int{1, 2})),
false, 0, []int{3},
[]int{1, 2, 1, 2, 1, 2},
Shape{3, 2}, false,
},
{"ColVec Repeat on axis 1", New(WithShape(2, 1), WithBacking([]float32{1, 2})),
false, 1, []int{3},
[]float32{1, 1, 1, 2, 2, 2},
Shape{2, 3}, false,
},
{"RowVec Repeat on axis 1", New(WithShape(1, 2), WithBacking([]float64{1, 2})),
false, 1, []int{3},
[]float64{1, 1, 1, 2, 2, 2},
Shape{1, 6}, false,
},
{"Vector Repeat on all axes", New(WithShape(2), WithBacking([]byte{1, 2})),
false, AllAxes, []int{3},
[]byte{1, 1, 1, 2, 2, 2},
Shape{6}, false,
},
{"ColVec Repeat on all axes", New(WithShape(2, 1), WithBacking([]int32{1, 2})),
false, AllAxes, []int{3},
[]int32{1, 1, 1, 2, 2, 2},
Shape{6}, false,
},
{"RowVec Repeat on all axes", New(WithShape(1, 2), WithBacking([]int64{1, 2})),
false, AllAxes, []int{3},
[]int64{1, 1, 1, 2, 2, 2},
Shape{6}, false,
},
{"M[2,2] Repeat on all axes with repeats = (1,2,1,1)", New(WithShape(2, 2), WithBacking([]int{1, 2, 3, 4})),
false, AllAxes, []int{1, 2, 1, 1},
[]int{1, 2, 2, 3, 4},
Shape{5}, false,
},
{"M[2,2] Repeat on axis 1 with repeats = (2, 1)", New(WithShape(2, 2), WithBacking([]float32{1, 2, 3, 4})),
false, 1, []int{2, 1},
[]float32{1, 1, 2, 3, 3, 4},
Shape{2, 3}, false,
},
{"M[2,2] Repeat on axis 1 with repeats = (1, 2)", New(WithShape(2, 2), WithBacking([]float64{1, 2, 3, 4})),
false, 1, []int{1, 2},
[]float64{1, 2, 2, 3, 4, 4},
Shape{2, 3}, false,
},
{"M[2,2] Repeat on axis 0 with repeats = (1, 2)", New(WithShape(2, 2), WithBacking([]float64{1, 2, 3, 4})),
false, 0, []int{1, 2},
[]float64{1, 2, 3, 4, 3, 4},
Shape{3, 2}, false,
},
{"M[2,2] Repeat on axis 0 with repeats = (2, 1)", New(WithShape(2, 2), WithBacking([]float64{1, 2, 3, 4})),
false, 0, []int{2, 1},
[]float64{1, 2, 1, 2, 3, 4},
Shape{3, 2}, false,
},
{"3T[2,3,2] Repeat on axis 1 with repeats = (1,2,1)", New(WithShape(2, 3, 2), WithBacking(vecf64.Range(1, 2*3*2+1))),
false, 1, []int{1, 2, 1},
[]float64{1, 2, 3, 4, 3, 4, 5, 6, 7, 8, 9, 10, 9, 10, 11, 12},
Shape{2, 4, 2}, false,
},
{"3T[2,3,2] Generic Repeat by 2", New(WithShape(2, 3, 2), WithBacking(vecf64.Range(1, 2*3*2+1))),
false, AllAxes, []int{2},
[]float64{1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12},
Shape{24}, false,
},
{"3T[2,3,2] repeat with broadcast errors", New(WithShape(2, 3, 2), WithBacking(vecf64.Range(1, 2*3*2+1))),
false, 0, []int{1, 2, 1},
nil, nil, true,
},
// idiots
{"Nonexistent axis", New(WithShape(2, 1), WithBacking([]bool{true, false})),
false, 2, []int{3}, nil, nil, true,
},
}
func TestDense_Repeat(t *testing.T) {
assert := assert.New(t)
for i, test := range repeatTests {
T, err := test.tensor.Repeat(test.axis, test.repeats...)
if checkErr(t, test.err, err, "Repeat", i) {
continue
}
var D DenseTensor
if D, err = getDenseTensor(T); err != nil {
t.Errorf("Expected Repeat to return a *Dense. got %v of %T instead", T, T)
continue
}
if test.ne {
assert.NotEqual(test.tensor, D, test.name)
}
assert.Equal(test.correct, D.Data(), test.name)
assert.Equal(test.shape, D.Shape(), test.name)
}
}
func TestDense_Repeat_Slow(t *testing.T) {
rt2 := make([]repeatTest, len(repeatTests))
for i, rt := range repeatTests {
rt2[i] = repeatTest{
name: rt.name,
ne: rt.ne,
axis: rt.axis,
repeats: rt.repeats,
correct: rt.correct,
shape: rt.shape,
err: rt.err,
tensor: rt.tensor.Clone().(*Dense),
}
}
for i := range rt2 {
maskLen := rt2[i].tensor.len()
mask := make([]bool, maskLen)
rt2[i].tensor.mask = mask
}
assert := assert.New(t)
for i, test := range rt2 {
T, err := test.tensor.Repeat(test.axis, test.repeats...)
if checkErr(t, test.err, err, "Repeat", i) {
continue
}
var D DenseTensor
if D, err = getDenseTensor(T); err != nil {
t.Errorf("Expected Repeat to return a *Dense. got %v of %T instead", T, T)
continue
}
if test.ne {
assert.NotEqual(test.tensor, D, test.name)
}
assert.Equal(test.correct, D.Data(), test.name)
assert.Equal(test.shape, D.Shape(), test.name)
}
}
func TestDense_CopyTo(t *testing.T) {
assert := assert.New(t)
var T, T2 *Dense
var T3 Tensor
var err error
T = New(WithShape(2), WithBacking([]float64{1, 2}))
T2 = New(Of(Float64), WithShape(1, 2))
err = T.CopyTo(T2)
if err != nil {
t.Fatal(err)
}
assert.Equal(T2.Data(), T.Data())
// now, modify T1's data
T.Set(0, float64(5000))
assert.NotEqual(T2.Data(), T.Data())
// test views
T = New(Of(Byte), WithShape(3, 3))
T2 = New(Of(Byte), WithShape(2, 2))
T3, _ = T.Slice(makeRS(0, 2), makeRS(0, 2)) // T[0:2, 0:2], shape == (2,2)
if err = T2.CopyTo(T3.(*Dense)); err != nil {
t.Log(err) // for now it's a not yet implemented error. TODO: FIX THIS
}
// dumbass time
T = New(Of(Float32), WithShape(3, 3))
T2 = New(Of(Float32), WithShape(2, 2))
if err = T.CopyTo(T2); err == nil {
t.Error("Expected an error")
}
if err = T.CopyTo(T); err != nil {
t.Error("Copying a *Tensor to itself should yield no error. ")
}
}
var denseSliceTests = []struct {
name string
data interface{}
shape Shape
slices []Slice
correctShape Shape
correctStride []int
correctData interface{}
}{
// scalar-equiv vector (issue 102)
{"a[0], a is scalar-equiv", []float64{2},
Shape{1}, []Slice{ss(0)}, ScalarShape(), nil, 2.0},
// vector
{"a[0]", []bool{true, true, false, false, false},
Shape{5}, []Slice{ss(0)}, ScalarShape(), nil, true},
{"a[0:2]", Range(Byte, 0, 5), Shape{5}, []Slice{makeRS(0, 2)}, Shape{2}, []int{1}, []byte{0, 1}},
{"a[1:5:2]", Range(Int32, 0, 5), Shape{5}, []Slice{makeRS(1, 5, 2)}, Shape{2}, []int{2}, []int32{1, 2, 3, 4}},
// colvec
{"c[0]", Range(Int64, 0, 5), Shape{5, 1}, []Slice{ss(0)}, ScalarShape(), nil, int64(0)},
{"c[0:2]", Range(Float32, 0, 5), Shape{5, 1}, []Slice{makeRS(0, 2)}, Shape{2, 1}, []int{1, 1}, []float32{0, 1}},
{"c[1:5:2]", Range(Float64, 0, 5), Shape{5, 1}, []Slice{makeRS(0, 5, 2)}, Shape{2, 1}, []int{2, 1}, []float64{0, 1, 2, 3, 4}},
// // rowvec
{"r[0]", Range(Float64, 0, 5), Shape{1, 5}, []Slice{ss(0)}, Shape{1, 5}, []int{1}, []float64{0, 1, 2, 3, 4}},
{"r[0:2]", Range(Float64, 0, 5), Shape{1, 5}, []Slice{makeRS(0, 2)}, Shape{1, 5}, []int{1}, []float64{0, 1, 2, 3, 4}},
{"r[0:5:2]", Range(Float64, 0, 5), Shape{1, 5}, []Slice{makeRS(0, 5, 2)}, Shape{1, 5}, []int{1}, []float64{0, 1, 2, 3, 4}},
{"r[:, 0]", Range(Float64, 0, 5), Shape{1, 5}, []Slice{nil, ss(0)}, ScalarShape(), nil, float64(0)},
{"r[:, 0:2]", Range(Float64, 0, 5), Shape{1, 5}, []Slice{nil, makeRS(0, 2)}, Shape{1, 2}, []int{5, 1}, []float64{0, 1}},
{"r[:, 1:5:2]", Range(Float64, 0, 5), Shape{1, 5}, []Slice{nil, makeRS(1, 5, 2)}, Shape{1, 2}, []int{5, 2}, []float64{1, 2, 3, 4}},
// // matrix
{"A[0]", Range(Float64, 0, 6), Shape{2, 3}, []Slice{ss(0)}, Shape{1, 3}, []int{1}, Range(Float64, 0, 3)},
{"A[0:2]", Range(Float64, 0, 20), Shape{4, 5}, []Slice{makeRS(0, 2)}, Shape{2, 5}, []int{5, 1}, Range(Float64, 0, 10)},
{"A[0, 0]", Range(Float64, 0, 20), Shape{4, 5}, []Slice{ss(0), ss(0)}, ScalarShape(), nil, float64(0)},
{"A[0, 1:5]", Range(Float64, 0, 20), Shape{4, 5}, []Slice{ss(0), makeRS(1, 5)}, Shape{4}, []int{1}, Range(Float64, 1, 5)},
{"A[0, 1:5:2]", Range(Float64, 0, 20), Shape{4, 5}, []Slice{ss(0), makeRS(1, 5, 2)}, Shape{1, 2}, []int{2}, Range(Float64, 1, 5)},
{"A[:, 0]", Range(Float64, 0, 20), Shape{4, 5}, []Slice{nil, ss(0)}, Shape{4, 1}, []int{5}, Range(Float64, 0, 16)},
{"A[:, 1:5]", Range(Float64, 0, 20), Shape{4, 5}, []Slice{nil, makeRS(1, 5)}, Shape{4, 4}, []int{5, 1}, Range(Float64, 1, 20)},
{"A[:, 1:5:2]", Range(Float64, 0, 20), Shape{4, 5}, []Slice{nil, makeRS(1, 5, 2)}, Shape{4, 2}, []int{5, 2}, Range(Float64, 1, 20)},
// 3tensor with leading and trailing 1s
{"3T1[0]", Range(Float64, 0, 9), Shape{1, 9, 1}, []Slice{ss(0)}, Shape{9, 1}, []int{1, 1}, Range(Float64, 0, 9)},
{"3T1[nil, 0:2]", Range(Float64, 0, 9), Shape{1, 9, 1}, []Slice{nil, makeRS(0, 2)}, Shape{1, 2, 1}, []int{9, 1, 1}, Range(Float64, 0, 2)},
{"3T1[nil, 0:5:3]", Range(Float64, 0, 9), Shape{1, 9, 1}, []Slice{nil, makeRS(0, 5, 3)}, Shape{1, 2, 1}, []int{9, 3, 1}, Range(Float64, 0, 5)},
{"3T1[nil, 1:5:3]", Range(Float64, 0, 9), Shape{1, 9, 1}, []Slice{nil, makeRS(1, 5, 3)}, Shape{1, 2, 1}, []int{9, 3, 1}, Range(Float64, 1, 5)},
{"3T1[nil, 1:9:3]", Range(Float64, 0, 9), Shape{1, 9, 1}, []Slice{nil, makeRS(1, 9, 3)}, Shape{1, 3, 1}, []int{9, 3, 1}, Range(Float64, 1, 9)},
// 3tensor
{"3T[0]", Range(Float64, 0, 36), Shape{2, 9, 2}, []Slice{ss(0)}, Shape{9, 2}, []int{2, 1}, Range(Float64, 0, 18)},
{"3T[1]", Range(Float64, 0, 36), Shape{2, 9, 2}, []Slice{ss(1)}, Shape{9, 2}, []int{2, 1}, Range(Float64, 18, 36)},
{"3T[1, 2]", Range(Float64, 0, 36), Shape{2, 9, 2}, []Slice{ss(1), ss(2)}, Shape{2}, []int{1}, Range(Float64, 22, 24)},
{"3T[1, 2:4]", Range(Float64, 0, 36), Shape{2, 9, 2}, []Slice{ss(1), makeRS(2, 4)}, Shape{2, 2}, []int{2, 1}, Range(Float64, 22, 26)},
{"3T[1, 2:8:2]", Range(Float64, 0, 36), Shape{2, 9, 2}, []Slice{ss(1), makeRS(2, 8, 2)}, Shape{3, 2}, []int{4, 1}, Range(Float64, 22, 34)},
{"3T[1, 2:8:3]", Range(Float64, 0, 36), Shape{2, 9, 2}, []Slice{ss(1), makeRS(2, 8, 3)}, Shape{2, 2}, []int{6, 1}, Range(Float64, 22, 34)},
{"3T[1, 2:9:2]", Range(Float64, 0, 126), Shape{2, 9, 7}, []Slice{ss(1), makeRS(2, 9, 2)}, Shape{4, 7}, []int{14, 1}, Range(Float64, 77, 126)},
{"3T[1, 2:9:2, 1]", Range(Float64, 0, 126), Shape{2, 9, 7}, []Slice{ss(1), makeRS(2, 9, 2), ss(1)}, Shape{4}, []int{14}, Range(Float64, 78, 121)}, // should this be a colvec?
{"3T[1, 2:9:2, 1:4:2]", Range(Float64, 0, 126), Shape{2, 9, 7}, []Slice{ss(1), makeRS(2, 9, 2), makeRS(1, 4, 2)}, Shape{4, 2}, []int{14, 2}, Range(Float64, 78, 123)},
}
func TestDense_Slice(t *testing.T) {
assert := assert.New(t)
var T *Dense
var V Tensor
var err error
for _, sts := range denseSliceTests {
T = New(WithShape(sts.shape...), WithBacking(sts.data))
t.Log(sts.name)
if V, err = T.Slice(sts.slices...); err != nil {
t.Error(err)
continue
}
assert.True(sts.correctShape.Eq(V.Shape()), "Test: %v - Incorrect Shape. Correct: %v. Got %v", sts.name, sts.correctShape, V.Shape())
assert.Equal(sts.correctStride, V.Strides(), "Test: %v - Incorrect Stride", sts.name)
assert.Equal(sts.correctData, V.Data(), "Test: %v - Incorrect Data", sts.name)
}
// Transposed slice
T = New(WithShape(2, 3), WithBacking(Range(Float32, 0, 6)))
T.T()
V, err = T.Slice(ss(0))
assert.True(Shape{2}.Eq(V.Shape()))
assert.Equal([]int{3}, V.Strides())
assert.Equal([]float32{0, 1, 2, 3}, V.Data())
assert.True(V.(*Dense).old.IsZero())
// slice a sliced
t.Logf("%v", V)
V, err = V.Slice(makeRS(1, 2))
t.Logf("%v", V)
assert.True(ScalarShape().Eq(V.Shape()))
assert.Equal(float32(3), V.Data())
// And now, ladies and gentlemen, the idiots!
// too many slices
_, err = T.Slice(ss(1), ss(2), ss(3), ss(4))
if err == nil {
t.Error("Expected a DimMismatchError error")
}
// out of range sliced
_, err = T.Slice(makeRS(20, 5))
if err == nil {
t.Error("Expected a IndexError")
}
// surely nobody can be this dumb? Having a start of negatives
_, err = T.Slice(makeRS(-1, 1))
if err == nil {
t.Error("Expected a IndexError")
}
}
func TestDense_Narrow(t *testing.T) {
testCases := []struct {
x *Dense
dim, start, length int
expected *Dense
}{
{
x: New(
WithShape(3),
WithBacking([]int{1, 2, 3}),
),
dim: 0,
start: 1,
length: 1,
expected: New(
WithShape(),
WithBacking([]int{2}),
),
},
{
x: New(
WithShape(3, 3),
WithBacking([]int{1, 2, 3, 4, 5, 6, 7, 8, 9}),
),
dim: 0,
start: 0,
length: 2,
expected: New(
WithShape(2, 3),
WithBacking([]int{1, 2, 3, 4, 5, 6}),
),
},
{
x: New(
WithShape(3, 3),
WithBacking([]int{1, 2, 3, 4, 5, 6, 7, 8, 9}),
),
dim: 1,
start: 1,
length: 2,
expected: New(
WithShape(3, 2),
WithBacking([]int{2, 3, 5, 6, 8, 9}),
),
},
{
x: New(
WithShape(3, 3),
WithBacking([]int{1, 2, 3, 4, 5, 6, 7, 8, 9}),
),
dim: 1,
start: 0,
length: 1,
expected: New(
WithShape(3),
WithBacking([]int{1, 4, 7}),
),
},
}
for i, tC := range testCases {
t.Run(fmt.Sprintf("Example #%d narrow(%v,%d,%d,%v)", i+1, tC.x.Shape(), tC.dim, tC.start, tC.length), func(t *testing.T) {
c := assert.New(t)
// t.Logf("X:\n%v", tC.x)
y, err := tC.x.Narrow(tC.dim, tC.start, tC.length)
c.NoError(err)
// t.Logf("y:\n%v", y)
yMat := y.Materialize()
c.Equal(tC.expected.Shape(), yMat.Shape())
c.Equal(tC.expected.Data(), yMat.Data())
// err = y.Memset(1024)
// c.NoError(err)
// t.Logf("After Memset\nY: %v\nX:\n%v", y, tC.x)
})
}
}
func TestDense_SliceInto(t *testing.T) {
V := New(WithShape(100), Of(Byte))
T := New(WithBacking([]float64{1, 2, 3, 4, 5, 6}), WithShape(2, 3))
T.SliceInto(V, ss(0))
assert.True(t, Shape{3}.Eq(V.Shape()), "Got %v", V.Shape())
assert.Equal(t, []float64{1, 2, 3}, V.Data())
}
var rollaxisTests = []struct {
axis, start int
correctShape Shape
}{
{0, 0, Shape{1, 2, 3, 4}},
{0, 1, Shape{1, 2, 3, 4}},
{0, 2, Shape{2, 1, 3, 4}},
{0, 3, Shape{2, 3, 1, 4}},
{0, 4, Shape{2, 3, 4, 1}},
{1, 0, Shape{2, 1, 3, 4}},
{1, 1, Shape{1, 2, 3, 4}},
{1, 2, Shape{1, 2, 3, 4}},
{1, 3, Shape{1, 3, 2, 4}},
{1, 4, Shape{1, 3, 4, 2}},
{2, 0, Shape{3, 1, 2, 4}},
{2, 1, Shape{1, 3, 2, 4}},
{2, 2, Shape{1, 2, 3, 4}},
{2, 3, Shape{1, 2, 3, 4}},
{2, 4, Shape{1, 2, 4, 3}},
{3, 0, Shape{4, 1, 2, 3}},
{3, 1, Shape{1, 4, 2, 3}},
{3, 2, Shape{1, 2, 4, 3}},
{3, 3, Shape{1, 2, 3, 4}},
{3, 4, Shape{1, 2, 3, 4}},
}
// The RollAxis tests are directly adapted from Numpy's test cases.
func TestDense_RollAxis(t *testing.T) {
assert := assert.New(t)
var T *Dense
var err error
for _, rats := range rollaxisTests {
T = New(Of(Byte), WithShape(1, 2, 3, 4))
if _, err = T.RollAxis(rats.axis, rats.start, false); assert.NoError(err) {
assert.True(rats.correctShape.Eq(T.Shape()), "%d %d Expected %v, got %v", rats.axis, rats.start, rats.correctShape, T.Shape())
}
}
}
var concatTests = []struct {
name string
dt Dtype
a interface{}
b interface{}
shape Shape
shapeB Shape
axis int
correctShape Shape
correctData interface{}
}{
// Float64
{"vector", Float64, nil, nil, Shape{2}, nil, 0, Shape{4}, []float64{0, 1, 0, 1}},
{"matrix; axis 0 ", Float64, nil, nil, Shape{2, 2}, nil, 0, Shape{4, 2}, []float64{0, 1, 2, 3, 0, 1, 2, 3}},
{"matrix; axis 1 ", Float64, nil, nil, Shape{2, 2}, nil, 1, Shape{2, 4}, []float64{0, 1, 0, 1, 2, 3, 2, 3}},
// Float32
{"vector", Float32, nil, nil, Shape{2}, nil, 0, Shape{4}, []float32{0, 1, 0, 1}},
{"matrix; axis 0 ", Float32, nil, nil, Shape{2, 2}, nil, 0, Shape{4, 2}, []float32{0, 1, 2, 3, 0, 1, 2, 3}},
{"matrix; axis 1 ", Float32, nil, nil, Shape{2, 2}, nil, 1, Shape{2, 4}, []float32{0, 1, 0, 1, 2, 3, 2, 3}},
// Int
{"vector", Int, nil, nil, Shape{2}, nil, 0, Shape{4}, []int{0, 1, 0, 1}},
{"matrix; axis 0 ", Int, nil, nil, Shape{2, 2}, nil, 0, Shape{4, 2}, []int{0, 1, 2, 3, 0, 1, 2, 3}},
{"matrix; axis 1 ", Int, nil, nil, Shape{2, 2}, nil, 1, Shape{2, 4}, []int{0, 1, 0, 1, 2, 3, 2, 3}},
// Int64
{"vector", Int64, nil, nil, Shape{2}, nil, 0, Shape{4}, []int64{0, 1, 0, 1}},
{"matrix; axis 0 ", Int64, nil, nil, Shape{2, 2}, nil, 0, Shape{4, 2}, []int64{0, 1, 2, 3, 0, 1, 2, 3}},
{"matrix; axis 1 ", Int64, nil, nil, Shape{2, 2}, nil, 1, Shape{2, 4}, []int64{0, 1, 0, 1, 2, 3, 2, 3}},
// Int32
{"vector", Int32, nil, nil, Shape{2}, nil, 0, Shape{4}, []int32{0, 1, 0, 1}},
{"matrix; axis 0 ", Int32, nil, nil, Shape{2, 2}, nil, 0, Shape{4, 2}, []int32{0, 1, 2, 3, 0, 1, 2, 3}},
{"matrix; axis 1 ", Int32, nil, nil, Shape{2, 2}, nil, 1, Shape{2, 4}, []int32{0, 1, 0, 1, 2, 3, 2, 3}},
// Byte
{"vector", Byte, nil, nil, Shape{2}, nil, 0, Shape{4}, []byte{0, 1, 0, 1}},
{"matrix; axis 0 ", Byte, nil, nil, Shape{2, 2}, nil, 0, Shape{4, 2}, []byte{0, 1, 2, 3, 0, 1, 2, 3}},
{"matrix; axis 1 ", Byte, nil, nil, Shape{2, 2}, nil, 1, Shape{2, 4}, []byte{0, 1, 0, 1, 2, 3, 2, 3}},
// Bool
{"vector", Bool, []bool{true, false}, nil, Shape{2}, nil, 0, Shape{4}, []bool{true, false, true, false}},
{"matrix; axis 0 ", Bool, []bool{true, false, true, false}, nil, Shape{2, 2}, nil, 0, Shape{4, 2}, []bool{true, false, true, false, true, false, true, false}},
{"matrix; axis 1 ", Bool, []bool{true, false, true, false}, nil, Shape{2, 2}, nil, 1, Shape{2, 4}, []bool{true, false, true, false, true, false, true, false}},
// gorgonia/gorgonia#218 related
{"matrix; axis 0", Float64, nil, nil, Shape{2, 2}, Shape{1, 2}, 0, Shape{3, 2}, []float64{0, 1, 2, 3, 0, 1}},
{"matrix; axis 1", Float64, nil, nil, Shape{2, 2}, Shape{2, 1}, 1, Shape{2, 3}, []float64{0, 1, 0, 2, 3, 1}},
{"colvec matrix, axis 0", Float64, nil, nil, Shape{2, 1}, Shape{1, 1}, 0, Shape{3, 1}, []float64{0, 1, 0}},
{"rowvec matrix, axis 1", Float64, nil, nil, Shape{1, 2}, Shape{1, 1}, 1, Shape{1, 3}, []float64{0, 1, 0}},
{"3tensor; axis 0", Float64, nil, nil, Shape{2, 3, 2}, Shape{1, 3, 2}, 0, Shape{3, 3, 2}, []float64{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 0, 1, 2, 3, 4, 5}},
{"3tensor; axis 2", Float64, nil, nil, Shape{2, 3, 2}, Shape{2, 3, 1}, 2, Shape{2, 3, 3}, []float64{0, 1, 0, 2, 3, 1, 4, 5, 2, 6, 7, 3, 8, 9, 4, 10, 11, 5}},
{"3tensor; axis 1", Float64, nil, nil, Shape{2, 3, 2}, Shape{2, 1, 2}, 1, Shape{2, 4, 2}, []float64{0, 1, 2, 3, 4, 5, 0, 1, 6, 7, 8, 9, 10, 11, 2, 3}},
}
func TestDense_Concat(t *testing.T) {
assert := assert.New(t)
for _, cts := range concatTests {
var T0, T1 *Dense
if cts.a == nil {
T0 = New(WithShape(cts.shape...), WithBacking(Range(cts.dt, 0, cts.shape.TotalSize())))
} else {
T0 = New(WithShape(cts.shape...), WithBacking(cts.a))
}
switch {
case cts.shapeB == nil && cts.a == nil:
T1 = New(WithShape(cts.shape...), WithBacking(Range(cts.dt, 0, cts.shape.TotalSize())))
case cts.shapeB == nil && cts.a != nil:
T1 = New(WithShape(cts.shape...), WithBacking(cloneArray(cts.a)))
case cts.shapeB != nil && cts.b == nil:
T1 = New(WithShape(cts.shapeB...), WithBacking(Range(cts.dt, 0, cts.shapeB.TotalSize())))
case cts.shapeB != nil && cts.b != nil:
T1 = New(WithShape(cts.shapeB...), WithBacking(cts.b))
}
T2, err := T0.Concat(cts.axis, T1)
if err != nil {
t.Errorf("Test %v failed: %v", cts.name, err)
continue
}
assert.True(cts.correctShape.Eq(T2.Shape()))
assert.Equal(cts.correctData, T2.Data())
}
//Masked case
for _, cts := range concatTests {
var T0, T1 *Dense
if cts.a == nil {
T0 = New(WithShape(cts.shape...), WithBacking(Range(cts.dt, 0, cts.shape.TotalSize())))
T0.MaskedEqual(castToDt(0.0, cts.dt))
} else {
T0 = New(WithShape(cts.shape...), WithBacking(cts.a))
T0.MaskedEqual(castToDt(0.0, cts.dt))
}
switch {
case cts.shapeB == nil && cts.a == nil:
T1 = New(WithShape(cts.shape...), WithBacking(Range(cts.dt, 0, cts.shape.TotalSize())))
case cts.shapeB == nil && cts.a != nil:
T1 = New(WithShape(cts.shape...), WithBacking(cloneArray(cts.a)))
case cts.shapeB != nil && cts.b == nil:
T1 = New(WithShape(cts.shapeB...), WithBacking(Range(cts.dt, 0, cts.shapeB.TotalSize())))
case cts.shapeB != nil && cts.b != nil:
T1 = New(WithShape(cts.shapeB...), WithBacking(cts.b))
}
T1.MaskedEqual(castToDt(0.0, cts.dt))
T2, err := T0.Concat(cts.axis, T1)
if err != nil {
t.Errorf("Test %v failed: %v", cts.name, err)
continue
}
T3 := New(WithShape(cts.correctShape...), WithBacking(cts.correctData))
T3.MaskedEqual(castToDt(0.0, cts.dt))
assert.True(cts.correctShape.Eq(T2.Shape()))
assert.Equal(cts.correctData, T2.Data())
assert.Equal(T3.mask, T2.mask)
}
}
func TestDense_Concat_sliced(t *testing.T) {
v := New(
WithShape(1, 5),
WithBacking([]float64{0, 1, 2, 3, 4}),
)
cols := make([]Tensor, v.Shape().TotalSize())
for i := 0; i < v.Shape().TotalSize(); i++ {
sliced, err := v.Slice(nil, ss(i))
if err != nil {
t.Fatalf("Failed to slice %d. Error: %v", i, err)
}
if err = sliced.Reshape(sliced.Shape().TotalSize(), 1); err != nil {
t.Fatalf("Failed to reshape %d. Error %v", i, err)
}
cols[i] = sliced
}
result, err := Concat(1, cols[0], cols[1:]...)
if err != nil {
t.Error(err)
}
assert.Equal(t, v.Data(), result.Data())
if v.Uintptr() == result.Uintptr() {
t.Error("They should not share the same backing data!")
}
}
var simpleStackTests = []struct {
name string
dt Dtype
shape Shape
axis int
stackCount int
correctShape Shape
correctData interface{}
}{
// Size 8
{"vector, axis 0, stack 2", Float64, Shape{2}, 0, 2, Shape{2, 2}, []float64{0, 1, 100, 101}},
{"vector, axis 1, stack 2", Float64, Shape{2}, 1, 2, Shape{2, 2}, []float64{0, 100, 1, 101}},
{"matrix, axis 0, stack 2", Float64, Shape{2, 3}, 0, 2, Shape{2, 2, 3}, []float64{0, 1, 2, 3, 4, 5, 100, 101, 102, 103, 104, 105}},
{"matrix, axis 1, stack 2", Float64, Shape{2, 3}, 1, 2, Shape{2, 2, 3}, []float64{0, 1, 2, 100, 101, 102, 3, 4, 5, 103, 104, 105}},
{"matrix, axis 2, stack 2", Float64, Shape{2, 3}, 2, 2, Shape{2, 3, 2}, []float64{0, 100, 1, 101, 2, 102, 3, 103, 4, 104, 5, 105}},
{"matrix, axis 0, stack 3", Float64, Shape{2, 3}, 0, 3, Shape{3, 2, 3}, []float64{0, 1, 2, 3, 4, 5, 100, 101, 102, 103, 104, 105, 200, 201, 202, 203, 204, 205}},
{"matrix, axis 1, stack 3", Float64, Shape{2, 3}, 1, 3, Shape{2, 3, 3}, []float64{0, 1, 2, 100, 101, 102, 200, 201, 202, 3, 4, 5, 103, 104, 105, 203, 204, 205}},
{"matrix, axis 2, stack 3", Float64, Shape{2, 3}, 2, 3, Shape{2, 3, 3}, []float64{0, 100, 200, 1, 101, 201, 2, 102, 202, 3, 103, 203, 4, 104, 204, 5, 105, 205}},
// Size 4
{"vector, axis 0, stack 2 (f32)", Float32, Shape{2}, 0, 2, Shape{2, 2}, []float32{0, 1, 100, 101}},
{"vector, axis 1, stack 2 (f32)", Float32, Shape{2}, 1, 2, Shape{2, 2}, []float32{0, 100, 1, 101}},
{"matrix, axis 0, stack 2 (f32)", Float32, Shape{2, 3}, 0, 2, Shape{2, 2, 3}, []float32{0, 1, 2, 3, 4, 5, 100, 101, 102, 103, 104, 105}},
{"matrix, axis 1, stack 2 (f32)", Float32, Shape{2, 3}, 1, 2, Shape{2, 2, 3}, []float32{0, 1, 2, 100, 101, 102, 3, 4, 5, 103, 104, 105}},
{"matrix, axis 2, stack 2 (f32)", Float32, Shape{2, 3}, 2, 2, Shape{2, 3, 2}, []float32{0, 100, 1, 101, 2, 102, 3, 103, 4, 104, 5, 105}},
{"matrix, axis 0, stack 3 (f32)", Float32, Shape{2, 3}, 0, 3, Shape{3, 2, 3}, []float32{0, 1, 2, 3, 4, 5, 100, 101, 102, 103, 104, 105, 200, 201, 202, 203, 204, 205}},
{"matrix, axis 1, stack 3 (f32)", Float32, Shape{2, 3}, 1, 3, Shape{2, 3, 3}, []float32{0, 1, 2, 100, 101, 102, 200, 201, 202, 3, 4, 5, 103, 104, 105, 203, 204, 205}},
{"matrix, axis 2, stack 3 (f32)", Float32, Shape{2, 3}, 2, 3, Shape{2, 3, 3}, []float32{0, 100, 200, 1, 101, 201, 2, 102, 202, 3, 103, 203, 4, 104, 204, 5, 105, 205}},
// Size 2
{"vector, axis 0, stack 2 (i16)", Int16, Shape{2}, 0, 2, Shape{2, 2}, []int16{0, 1, 100, 101}},
{"vector, axis 1, stack 2 (i16)", Int16, Shape{2}, 1, 2, Shape{2, 2}, []int16{0, 100, 1, 101}},
{"matrix, axis 0, stack 2 (i16)", Int16, Shape{2, 3}, 0, 2, Shape{2, 2, 3}, []int16{0, 1, 2, 3, 4, 5, 100, 101, 102, 103, 104, 105}},
{"matrix, axis 1, stack 2 (i16)", Int16, Shape{2, 3}, 1, 2, Shape{2, 2, 3}, []int16{0, 1, 2, 100, 101, 102, 3, 4, 5, 103, 104, 105}},
{"matrix, axis 2, stack 2 (i16)", Int16, Shape{2, 3}, 2, 2, Shape{2, 3, 2}, []int16{0, 100, 1, 101, 2, 102, 3, 103, 4, 104, 5, 105}},
{"matrix, axis 0, stack 3 (i16)", Int16, Shape{2, 3}, 0, 3, Shape{3, 2, 3}, []int16{0, 1, 2, 3, 4, 5, 100, 101, 102, 103, 104, 105, 200, 201, 202, 203, 204, 205}},
{"matrix, axis 1, stack 3 (i16)", Int16, Shape{2, 3}, 1, 3, Shape{2, 3, 3}, []int16{0, 1, 2, 100, 101, 102, 200, 201, 202, 3, 4, 5, 103, 104, 105, 203, 204, 205}},
{"matrix, axis 2, stack 3 (i16)", Int16, Shape{2, 3}, 2, 3, Shape{2, 3, 3}, []int16{0, 100, 200, 1, 101, 201, 2, 102, 202, 3, 103, 203, 4, 104, 204, 5, 105, 205}},
// Size 1
{"vector, axis 0, stack 2 (u8)", Byte, Shape{2}, 0, 2, Shape{2, 2}, []byte{0, 1, 100, 101}},
{"vector, axis 1, stack 2 (u8)", Byte, Shape{2}, 1, 2, Shape{2, 2}, []byte{0, 100, 1, 101}},
{"matrix, axis 0, stack 2 (u8)", Byte, Shape{2, 3}, 0, 2, Shape{2, 2, 3}, []byte{0, 1, 2, 3, 4, 5, 100, 101, 102, 103, 104, 105}},
{"matrix, axis 1, stack 2 (u8)", Byte, Shape{2, 3}, 1, 2, Shape{2, 2, 3}, []byte{0, 1, 2, 100, 101, 102, 3, 4, 5, 103, 104, 105}},
{"matrix, axis 2, stack 2 (u8)", Byte, Shape{2, 3}, 2, 2, Shape{2, 3, 2}, []byte{0, 100, 1, 101, 2, 102, 3, 103, 4, 104, 5, 105}},
{"matrix, axis 0, stack 3 (u8)", Byte, Shape{2, 3}, 0, 3, Shape{3, 2, 3}, []byte{0, 1, 2, 3, 4, 5, 100, 101, 102, 103, 104, 105, 200, 201, 202, 203, 204, 205}},
{"matrix, axis 1, stack 3 (u8)", Byte, Shape{2, 3}, 1, 3, Shape{2, 3, 3}, []byte{0, 1, 2, 100, 101, 102, 200, 201, 202, 3, 4, 5, 103, 104, 105, 203, 204, 205}},
{"matrix, axis 2, stack 3 (u8)", Byte, Shape{2, 3}, 2, 3, Shape{2, 3, 3}, []byte{0, 100, 200, 1, 101, 201, 2, 102, 202, 3, 103, 203, 4, 104, 204, 5, 105, 205}},
}
var viewStackTests = []struct {
name string
dt Dtype
shape Shape
transform []int
slices []Slice
axis int
stackCount int
correctShape Shape
correctData interface{}
}{
// Size 8
{"matrix(4x4)[1:3, 1:3] axis 0", Float64, Shape{4, 4}, nil, []Slice{makeRS(1, 3), makeRS(1, 3)}, 0, 2, Shape{2, 2, 2}, []float64{5, 6, 9, 10, 105, 106, 109, 110}},
{"matrix(4x4)[1:3, 1:3] axis 1", Float64, Shape{4, 4}, nil, []Slice{makeRS(1, 3), makeRS(1, 3)}, 1, 2, Shape{2, 2, 2}, []float64{5, 6, 105, 106, 9, 10, 109, 110}},
{"matrix(4x4)[1:3, 1:3] axis 2", Float64, Shape{4, 4}, nil, []Slice{makeRS(1, 3), makeRS(1, 3)}, 2, 2, Shape{2, 2, 2}, []float64{5, 105, 6, 106, 9, 109, 10, 110}},