SqrtFunction.java

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package com.graphbuilder.math.func;

public class SqrtFunction implements Function {

    public SqrtFunction() {}

    public double of(double[] d, int numParam) {
        double root = d[0];
        //----------------------------------------------------------
        // hack: if the root is negative, we need to return 0
        //----------------------------------------------------------
        if (root< 0.0) {
            //System.err.println("neg sqrt " + root);
            return 0.0;
        }
        return java.lang.Math.sqrt(root);
    }

    public boolean acceptNumParam(int numParam) {
        return numParam == 1;
    }

    public String toString() {
        return "sqrt(x)";
    }
}