ec.cgp.functions
Class FunctionsRegression

java.lang.Object
  ec.cgp.functions.FunctionsRegression

All Implemented Interfaces:

Functions

public class FunctionsRegression
extends java.lang.Object
implements Functions

Function set for the regression problems.

Author:

David Oranchak, doranchak@gmail.com, http://oranchak.com

Field Summary

(package private) static int	F_ADD Add
(package private) static int	F_DIV Safe divide
(package private) static int	F_MUL Multiply
(package private) static int	F_SUB Subtract

Constructor Summary

FunctionsRegression()

Method Summary

int	arityOf(int fn) Return the arity of the given function
java.lang.Object	callFunction(java.lang.Object[] inputs, int function, int numFunctions) Interpret the given function and apply it to the given inputs.
java.lang.String	functionName(int fn) Return a function name, suitable for display in expressions, for the given function.
java.lang.String	inputName(int inp, java.lang.Object val) Return the name, suitable for display, for the given input.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

F_ADD

static int F_ADD

Add

F_SUB

static int F_SUB

Subtract

F_MUL

static int F_MUL

Multiply

F_DIV

static int F_DIV

Safe divide

Constructor Detail

FunctionsRegression

public FunctionsRegression()

Method Detail

callFunction

public java.lang.Object callFunction(java.lang.Object[] inputs,
                                     int function,
                                     int numFunctions)

Interpret the given function and apply it to the given inputs.

Specified by:

callFunction in interface Functions

Parameters:

inputs - The arguments passed to the function. It is possible that some or all of the arguments will be unused by some functions.

function - The function number. Every function number must map to a function.

numFunctions - The total number of functions available.

Returns:

the result of the function call

functionName

public java.lang.String functionName(int fn)

Return a function name, suitable for display in expressions, for the given function.

Specified by:

functionName in interface Functions

Parameters:

fn - The function number

Returns:

The descriptive function name that corresponds to this function number.

arityOf

public int arityOf(int fn)

Return the arity of the given function

Specified by:

arityOf in interface Functions

Parameters:

fn - the function number

Returns:

The number of inputs this function expects.

inputName

public java.lang.String inputName(int inp,
                                  java.lang.Object val)

Return the name, suitable for display, for the given input.

Specified by:

inputName in interface Functions

Parameters:

inp - The input number

val - Optional input value (needed if you want to display a constant value for this input)

Returns:

The descriptive input name that corresponds to this input.