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package stats_test
import (
"fmt"
"testing"
"github.com/montanaflynn/stats"
)
func ExampleSigmoid() {
s, _ := stats.Sigmoid([]float64{3.0, 1.0, 2.1})
fmt.Println(s)
// Output: [0.9525741268224334 0.7310585786300049 0.8909031788043871]
}
func TestSigmoidEmptyInput(t *testing.T) {
_, err := stats.Sigmoid([]float64{})
if err != stats.EmptyInputErr {
t.Errorf("Should have returned empty input error")
}
}
func TestSigmoid(t *testing.T) {
sm, err := stats.Sigmoid([]float64{-0.54761371, 17.04850603, 4.86054302})
if err != nil {
t.Error(err)
}
a := 0.3664182235138545
if sm[0] != a {
t.Errorf("%v != %v", sm[0], a)
}
a = 0.9999999605608187
if sm[1] != a {
t.Errorf("%v != %v", sm[1], a)
}
a = 0.9923132671908277
if sm[2] != a {
t.Errorf("%v != %v", sm[2], a)
}
}
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