stat: imported stat as a subtree

stat/distmv/uniform_test.go

@@ -0,0 +1,31 @@
+// Copyright ©2017 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package distmv
+
+import (
+	"math"
+	"testing"
+)
+
+func TestUniformEntropy(t *testing.T) {
+	for _, test := range []struct {
+		Uniform *Uniform
+		Entropy float64
+	}{
+		{
+			NewUniform([]Bound{{0, 1}, {0, 1}}, nil),
+			0,
+		},
+		{
+			NewUniform([]Bound{{-1, 3}, {2, 8}, {-5, -3}}, nil),
+			math.Log(48),
+		},
+	} {
+		ent := test.Uniform.Entropy()
+		if math.Abs(ent-test.Entropy) > 1e-14 {
+			t.Errorf("Entropy mismatch. Got %v, want %v", ent, test.Entropy)
+		}
+	}
+}