1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
#include "m.h"
#include <iostream>
#include <gtest/gtest.h>
#include <cassert>
using namespace std;
class MTest : public testing::Test {
public:
MTest() {}
protected:
virtual void SetUp() { }
virtual void TearDown() { }
};
TEST_F(MTest, Densities) {
double px1 = Md::log_gaussian_density(1.0, 0.0, 1.0);
double px2 = Md::log_gaussian_density(-1.0, 0.0, 1.0);
double py1 = Md::log_laplace_density(1.0, 0.0, 1.0);
double py2 = Md::log_laplace_density(1.0, 0.0, 1.0);
double pz1 = Md::log_triangle_density(1.0, -2.0, 2.0, 0.0);
double pz2 = Md::log_triangle_density(1.0, -2.0, 2.0, 0.0);
cerr << px1 << " " << py1 << " " << pz2 << endl;
EXPECT_FLOAT_EQ(px1, px2);
EXPECT_FLOAT_EQ(py1, py2);
EXPECT_FLOAT_EQ(pz1, pz2);
double b1 = Md::log_bivariate_gaussian_density(1.0, -1.0, 0.0, 0.0, 1.0, 1.0, -0.8);
double b2 = Md::log_bivariate_gaussian_density(-1.0, 1.0, 0.0, 0.0, 1.0, 1.0, -0.8);
cerr << b1 << " " << b2 << endl;
}
TEST_F(MTest, Poisson) {
double prev = 1.0;
double tot = 0;
for (int i = 0; i < 10; ++i) {
double p = Md::log_poisson(i, 0.99);
cerr << "p(i=" << i << ") = " << exp(p) << endl;
EXPECT_LT(p, prev);
tot += exp(p);
prev = p;
}
cerr << " tot=" << tot << endl;
EXPECT_LE(tot, 1.0);
}
TEST_F(MTest, YuleSimon) {
double prev = 1.0;
double tot = 0;
for (int i = 0; i < 10; ++i) {
double p = Md::log_yule_simon(i, 1.0);
cerr << "p(i=" << i << ") = " << exp(p) << endl;
EXPECT_LT(p, prev);
tot += exp(p);
prev = p;
}
cerr << " tot=" << tot << endl;
EXPECT_LE(tot, 1.0);
}
TEST_F(MTest, LogGeometric) {
double prev = 1.0;
double tot = 0;
for (int i = 0; i < 10; ++i) {
double p = Md::log_geometric(i, 0.5);
cerr << "p(i=" << i << ") = " << exp(p) << endl;
EXPECT_LT(p, prev);
tot += exp(p);
prev = p;
}
cerr << " tot=" << tot << endl;
EXPECT_LE(tot, 1.0);
}
TEST_F(MTest, GeneralizedFactorial) {
for (double i = 0.3; i < 10000; i += 0.4) {
double a = Md::log_generalized_factorial(1.0, i);
double b = lgamma(1.0 + i);
EXPECT_FLOAT_EQ(a,b);
}
double gf_3_6 = 3.0 * 4.0 * 5.0 * 6.0 * 7.0 * 8.0;
EXPECT_FLOAT_EQ(Md::log_generalized_factorial(3.0, 6.0), std::log(gf_3_6));
double gf_314_6 = 3.14 * 4.14 * 5.14 * 6.14 * 7.14 * 8.14;
EXPECT_FLOAT_EQ(Md::log_generalized_factorial(3.14, 6.0), std::log(gf_314_6));
}
int main(int argc, char** argv) {
testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
|
