AvgFunction.java

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package com.graphbuilder.math.func;

public class AvgFunction implements Function {

    public AvgFunction() {}

    public double of(double[] d, int numParam) {
        double sum = 0;

        for (int i = 0; i < numParam; i++)
            sum += d[i];

        return sum / numParam;
    }

    public boolean acceptNumParam(int numParam) {
        return numParam > 0;
    }

    public String toString() {
        return "avg(x1, x2, ..., xn)";
    }
}