Calculating Max with commons library

Question

I use commons.math3 for calculating some statistical moments, like this:

import org.apache.commons.math3.*;

And in my code:

    double beatsdifa[] = new double[beatsdif.size()];
    //fill array
    query.add(""+ percentile.evaluate(beatsdifa, 80.0));
    GeometricMean geoMean = new GeometricMean();
    query.add("" + geoMean.evaluate(beatsdifa));
    Mean mean2 = new Mean();
    query.add("" + mean2.evaluate(beatsdifa));
    Variance variance = new Variance();
    query.add("" + variance.evaluate(beatsdifa));
    StandardDeviation stdDev = new StandardDeviation();
    query.add(""+stdDev.evaluate(beatsdifa));
    Skewness skewness = new Skewness();
    query.add(""+skewness.evaluate(beatsdifa));
    Kurtosis kurtosis = new Kurtosis();
    query.add(""+kurtosis.evaluate(beatsdifa));

Now I also want to calculate Max, Min and Range.

I tried it like this, but that gives me an error:

        Min mix = new Min();
        query.add("" + min.evaluate(beatsdifa));
        Max max = new Max();
        query.add("" + max.evaluate(beatsdifa));

"The method double[] is undefined for max.evaluate."

Sorry to ask this perhaps easy questions, but the commons documentation was not so clear and I did not see an easy way to calculate this. Thanks for helping me out.

Answer 1

The commons library provides to classes named Max and Min. Make sure, that you import the correct one, which is

org.apache.commons.math3.stat.descriptive.rank.Max

The other one is

org.apache.commons.math3.analysis.function.Max