com.github.chen0040.glm.links.LinkFunction Maven / Gradle / Ivy

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package com.github.chen0040.glm.links;

/**
 * Created by xschen on 14/8/15.
 */
/// 
/// A link function a = f(b) is a bijection chosen to map the constraint interval onto the real line.
///
/// The inverse link function b = g(a) maps the real line onto the constraint interval
/// 
public interface LinkFunction extends Cloneable
{
    /// 
    /// The link function f(b) map the constraint interval {b} onto the real line {a}
    /// 
    /// 
    /// 
    double GetLink(double constraint_interval_value);

    /// 
    /// The inverse link function g(a) Map the real line {a} onto the constraint interval {b}
    /// 
    /// 
    /// 
    double GetInvLink(double real_line_value);

    /// 
    /// Return the derivative of the inverse link function g'(x)
    /// 
    /// 
    /// 
    double GetInvLinkDerivative(double real_line_value);

    LinkFunction makeCopy();
}