private <T> void checkNormalized(Iterable<T> targets, Metric<T> metric) {
for (T target1 : targets) {
for (T target2 : targets) {
if (target1 == target2) continue;
double distance1 = metric.distance(target1, target2);
assertTrue(">1", Double.compare(distance1, 1d) <= 0);
assertTrue("<0", Double.compare(distance1, 0d) >= 0);
double distance2 = metric.distance(target2, target1);
assertTrue(">1", Double.compare(distance2, 1d) <= 0);
assertTrue("<0", Double.compare(distance2, 0d) >= 0);
}
}
}
private <T> void checkSymmetric(Iterable<T> targets, Metric<T> metric) {
for (T target1 : targets) {
for (T target2 : targets) {
if (target1 == target2) continue;
double distance1 = metric.distance(target1, target2);
double distance2 = metric.distance(target2, target1);
assertTrue("not symmetric", Double.compare(distance1, distance2) == 0);
}
}
}
public void internalTestPerformance(Metric<double[]> metric, double[] value1, double[] value2)
throws IOException {
StopWatch stopWatch = new StopWatch();
stopWatch.start();
for (int i = 0; i < 10000000; i++) {
metric.distance(value1, value2);
}
System.out.println(metric.getClass().getName() + ": " + stopWatch.meanTime());
}
