com.facebook.presto.benchmark.driver.Stat Maven / Gradle / Ivy
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.benchmark.driver;
import com.google.common.base.MoreObjects;
import org.apache.commons.math3.stat.descriptive.moment.Mean;
import org.apache.commons.math3.stat.descriptive.moment.StandardDeviation;
import org.apache.commons.math3.stat.descriptive.rank.Median;
public class Stat
{
private final double mean;
private final double standardDeviation;
private final double median;
public Stat(double[] values)
{
mean = new Mean().evaluate(values);
standardDeviation = new StandardDeviation().evaluate(values);
median = new Median().evaluate(values);
}
public double getMean()
{
return mean;
}
public double getStandardDeviation()
{
return standardDeviation;
}
public double getMedian()
{
return median;
}
@Override
public String toString()
{
return MoreObjects.toStringHelper(this)
.add("mean", mean)
.add("standardDeviation", standardDeviation)
.add("median", median)
.toString();
}
}