Implementations of DoubleElement, which are based on calculating standard deviations on sets of incoming data, and use that as the uncertainty value.
Also, it includes some classes to keep track of 'sliding window' values of averages.
example of WindowedEventRate
WindowedEventRate rate = WindowedEventRate.builder()
.bucketCount(50)
.window(Duration.ofMinutes(50))
.build();
rate.newEvent();
...
..
log.info("Measured rate: {} /s", rate.getRate(TimeUnit.SECONDS) + " #/s");
log.info("Measured rate: {}", rate); // toStringanother example of WindowedEventRate
import org.meeuw.configuration.ConfigurationService;
import org.meeuw.math.Interval;
import org.meeuw.math.abstractalgebra.reals.RealNumber;
import org.meeuw.math.text.configuration.UncertaintyConfiguration;
import org.meeuw.theories.abstractalgebra.UncertainDoubleTheory;
import org.meeuw.time.TestClock;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.data.Percentage.withPercentage;
import static org.meeuw.math.text.configuration.UncertaintyConfiguration.Notation.PARENTHESES;
...
ConfigurationService.withAspect(UncertaintyConfiguration.class, e -> e.withNotation(PARENTHESES),
() -> {
TestClock clock = new TestClock();
try (WindowedEventRate rate = WindowedEventRate.builder()
.window(Duration.ofSeconds(100))
.bucketCount(10)
.clock(clock)
.build()) {
for (int i = 0; i < 100; i++) {
rate.accept(5 + (i % 3));
clock.tick();
}
clock.tick(50);
assertThat(rate.isWarmingUp()).isFalse();
assertThat(rate.getRate()).isEqualTo(5.930038867295947);
assertThat(rate.toString()).isEqualTo("5.9(1.8) /s");
}
});Just to keep track of averages and standard deviations of incoming data.
Allow to enter 'longs' and similar objects.
Like durations
keeps tracks of durations (in nanoseconds)
StatisticalLong mes = new StatisticalLong(DURATION_NS);
mes.enter(Duration.ofNanos(10), Duration.ofNanos(20));
assertThat(mes.durationValue()).isEqualTo(Duration.ofNanos(15));
assertThat(mes.optionalDurationValue()).contains(Duration.ofNanos(15));
assertThat(mes.getStandardDeviation()).isEqualTo(5.0d); // 5 ns
mes.enter(Duration.ofMinutes(5));
assertThat(mes.optionalDurationValue()).contains(Duration.parse("PT1M40.00000001S"));