Ejemplo n.º 1
0
func TrainNB0(trainMatrix [][]int, trainCategory []int) ([]float64, []float64, float64) {
	numTrainDocs := len(trainMatrix)
	numWords := len(trainMatrix[0])
	sumCategory := calc.SumInt(trainCategory)

	pAbusive := float64(sumCategory) / float64(numTrainDocs)
	p0Num := make([]int, numWords)
	p1Num := make([]int, numWords)

	p0Denom := float64(0.0)
	p1Denom := float64(0.0)

	for i := 0; i < numTrainDocs; i++ {
		if trainCategory[i] == 1 {
			p1Num = calc.AddIntVec(p1Num, trainMatrix[i])
			p1Denom += float64(calc.SumInt(trainMatrix[i]))
		} else {
			p0Num = calc.AddIntVec(p0Num, trainMatrix[i])
			p0Denom += float64(calc.SumInt(trainMatrix[i]))
		}
	}

	fmt.Println("p0Num: ", p0Num)
	fmt.Println("p1Num: ", p1Num)
	p1Vec := calc.DivIntVec(p1Num, p1Denom)
	p0Vec := calc.DivIntVec(p0Num, p0Denom)

	return p0Vec, p1Vec, pAbusive
}
Ejemplo n.º 2
0
func Test_AddIntVec(t *testing.T) {
	a := []int{1, 2, 3}
	b := []int{4, 5, 6}
	result := calc.AddIntVec(a, b)
	if len(result) != len(a) {
		t.Fatalf("Add wrong")
	}

	for i, count := 0, len(a); i < count; i++ {
		if result[i] != a[i]+b[i] {
			t.Fatalf("Add to wrong result")
		}
	}
}