Example usage for org.apache.commons.math3.stat.descriptive StorelessUnivariateStatistic getResult

Introduction

In this page you can find the example usage for org.apache.commons.math3.stat.descriptive StorelessUnivariateStatistic getResult.

Prototype

double getResult();

Source Link

Document

Returns the current value of the Statistic.

Usage

From source file:org.jpmml.evaluator.functions.AggregateFunction.java

@Override
public FieldValue evaluate(List<FieldValue> arguments) {
    StorelessUnivariateStatistic statistic = createStatistic();

    DataType dataType = null;// ww w .  ja  va 2  s.co  m

    // "Missing values in the input to an aggregate function are simply ignored"
    Iterable<FieldValue> values = Iterables.filter(arguments, Predicates.notNull());
    for (FieldValue value : values) {
        statistic.increment((value.asNumber()).doubleValue());

        if (dataType != null) {
            dataType = TypeUtil.getResultDataType(dataType, value.getDataType());
        } else

        {
            dataType = value.getDataType();
        }
    }

    if (statistic.getN() == 0) {
        throw new InvalidResultException(null);
    }

    Object result = cast(getResultType(dataType), statistic.getResult());

    return FieldValueUtil.create(result);
}

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