LogFunction.java

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package com.graphbuilder.math.func;

public class LogFunction implements Function {

    public LogFunction() {}

    public double of(double[] d, int numParam) {
        if (numParam == 1) {
            return java.lang.Math.log(d[0]) / java.lang.Math.log(10);
        }
        return java.lang.Math.log(d[0]) / java.lang.Math.log(d[1]);
    }

    public boolean acceptNumParam(int numParam) {
        return numParam == 1 || numParam == 2;
    }

    public String toString() {
        return "log(x):log(x, base)";
    }
}