go-chart/matrix/matrix_test.go

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package matrix
import (
"testing"
2018-04-05 09:42:38 +02:00
assert "github.com/blend/go-sdk/assert"
)
func TestNew(t *testing.T) {
assert := assert.New(t)
m := New(10, 5)
rows, cols := m.Size()
assert.Equal(10, rows)
assert.Equal(5, cols)
assert.Zero(m.Get(0, 0))
assert.Zero(m.Get(9, 4))
}
func TestNewWithValues(t *testing.T) {
assert := assert.New(t)
m := New(5, 2, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
rows, cols := m.Size()
assert.Equal(5, rows)
assert.Equal(2, cols)
assert.Equal(1, m.Get(0, 0))
assert.Equal(10, m.Get(4, 1))
}
func TestIdentitiy(t *testing.T) {
assert := assert.New(t)
id := Identity(5)
rows, cols := id.Size()
assert.Equal(5, rows)
assert.Equal(5, cols)
assert.Equal(1, id.Get(0, 0))
assert.Equal(1, id.Get(1, 1))
assert.Equal(1, id.Get(2, 2))
assert.Equal(1, id.Get(3, 3))
assert.Equal(1, id.Get(4, 4))
assert.Equal(0, id.Get(0, 1))
assert.Equal(0, id.Get(1, 0))
assert.Equal(0, id.Get(4, 0))
assert.Equal(0, id.Get(0, 4))
}
func TestNewFromArrays(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 2, 3, 4},
{5, 6, 7, 8},
})
assert.NotNil(m)
rows, cols := m.Size()
assert.Equal(2, rows)
assert.Equal(4, cols)
}
func TestOnes(t *testing.T) {
assert := assert.New(t)
ones := Ones(5, 10)
rows, cols := ones.Size()
assert.Equal(5, rows)
assert.Equal(10, cols)
for row := 0; row < rows; row++ {
for col := 0; col < cols; col++ {
assert.Equal(1, ones.Get(row, col))
}
}
}
func TestMatrixEpsilon(t *testing.T) {
assert := assert.New(t)
ones := Ones(2, 2)
ones = ones.WithEpsilon(0.001)
assert.Equal(0.001, ones.Epsilon())
}
func TestMatrixArrays(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 2, 3},
{4, 5, 6},
})
assert.NotNil(m)
arrays := m.Arrays()
assert.Equal(arrays, [][]float64{
{1, 2, 3},
{4, 5, 6},
})
}
func TestMatrixIsSquare(t *testing.T) {
assert := assert.New(t)
assert.False(NewFromArrays([][]float64{
{1, 2, 3},
{4, 5, 6},
}).IsSquare())
assert.False(NewFromArrays([][]float64{
{1, 2},
{3, 4},
{5, 6},
}).IsSquare())
assert.True(NewFromArrays([][]float64{
{1, 2},
{3, 4},
}).IsSquare())
}
func TestMatrixIsSymmetric(t *testing.T) {
assert := assert.New(t)
assert.False(NewFromArrays([][]float64{
{1, 2, 3},
{2, 1, 2},
}).IsSymmetric())
assert.False(NewFromArrays([][]float64{
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
}).IsSymmetric())
assert.True(NewFromArrays([][]float64{
{1, 2, 3},
{2, 1, 2},
{3, 2, 1},
}).IsSymmetric())
}
func TestMatrixGet(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
})
assert.Equal(1, m.Get(0, 0))
assert.Equal(2, m.Get(0, 1))
assert.Equal(3, m.Get(0, 2))
assert.Equal(4, m.Get(1, 0))
assert.Equal(5, m.Get(1, 1))
assert.Equal(6, m.Get(1, 2))
assert.Equal(7, m.Get(2, 0))
assert.Equal(8, m.Get(2, 1))
assert.Equal(9, m.Get(2, 2))
}
func TestMatrixSet(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
})
m.Set(1, 1, 99)
assert.Equal(99, m.Get(1, 1))
}
func TestMatrixCol(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
})
assert.Equal([]float64{1, 4, 7}, m.Col(0))
assert.Equal([]float64{2, 5, 8}, m.Col(1))
assert.Equal([]float64{3, 6, 9}, m.Col(2))
}
func TestMatrixRow(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
})
assert.Equal([]float64{1, 2, 3}, m.Row(0))
assert.Equal([]float64{4, 5, 6}, m.Row(1))
assert.Equal([]float64{7, 8, 9}, m.Row(2))
}
func TestMatrixSwapRows(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
})
m.SwapRows(0, 1)
assert.Equal([]float64{4, 5, 6}, m.Row(0))
assert.Equal([]float64{1, 2, 3}, m.Row(1))
assert.Equal([]float64{7, 8, 9}, m.Row(2))
}
func TestMatrixCopy(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
})
m2 := m.Copy()
assert.False(m == m2)
assert.True(m.Equals(m2))
}
func TestMatrixDiagonalVector(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 4, 7},
{4, 2, 8},
{7, 8, 3},
})
diag := m.DiagonalVector()
assert.Equal([]float64{1, 2, 3}, diag)
}
func TestMatrixDiagonalVectorLandscape(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 4, 7, 99},
{4, 2, 8, 99},
})
diag := m.DiagonalVector()
assert.Equal([]float64{1, 2}, diag)
}
func TestMatrixDiagonalVectorPortrait(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 4},
{4, 2},
{99, 99},
})
diag := m.DiagonalVector()
assert.Equal([]float64{1, 2}, diag)
}
func TestMatrixDiagonal(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 4, 7},
{4, 2, 8},
{7, 8, 3},
})
m2 := NewFromArrays([][]float64{
{1, 0, 0},
{0, 2, 0},
{0, 0, 3},
})
assert.True(m.Diagonal().Equals(m2))
}
func TestMatrixEquals(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 4, 7},
{4, 2, 8},
{7, 8, 3},
})
assert.False(m.Equals(nil))
var nilMatrix *Matrix
assert.True(nilMatrix.Equals(nil))
assert.False(m.Equals(New(1, 1)))
assert.False(m.Equals(New(3, 3)))
assert.True(m.Equals(New(3, 3, 1, 4, 7, 4, 2, 8, 7, 8, 3)))
}
func TestMatrixL(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
})
l := m.L()
assert.True(l.Equals(New(3, 3, 1, 2, 3, 0, 5, 6, 0, 0, 9)))
}
func TestMatrixU(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
})
u := m.U()
assert.True(u.Equals(New(3, 3, 0, 0, 0, 4, 0, 0, 7, 8, 0)))
}
func TestMatrixString(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
})
assert.Equal("1 2 3 \n4 5 6 \n7 8 9 \n", m.String())
}
func TestMatrixLU(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 3, 5},
{2, 4, 7},
{1, 1, 0},
})
l, u, p := m.LU()
assert.NotNil(l)
assert.NotNil(u)
assert.NotNil(p)
}
func TestMatrixQR(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{12, -51, 4},
{6, 167, -68},
{-4, 24, -41},
})
q, r := m.QR()
assert.NotNil(q)
assert.NotNil(r)
}
func TestMatrixTranspose(t *testing.T) {
assert := assert.New(t)
m := NewFromArrays([][]float64{
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
{10, 11, 12},
})
m2 := m.Transpose()
rows, cols := m2.Size()
assert.Equal(3, rows)
assert.Equal(4, cols)
assert.Equal(1, m2.Get(0, 0))
assert.Equal(10, m2.Get(0, 3))
assert.Equal(3, m2.Get(2, 0))
}