Facemorph.Stats
Class Functions

java.lang.Object
  Facemorph.Stats.Functions

public class Functions
extends java.lang.Object

A set of static statistical funtcions

Nested Class Summary

static class

Functions.StatisticsException

Constructor Summary

Functions()

Method Summary

static double	dotProduct(double[] left, double[] right) Return the inner (dot) product for two vectors
static double	magnitude(double[] vec)
static void	main(java.lang.String[] args)
static double[]	multiply(double[] vec, double scalar)
static void	multiplyInPlace(double[] vec, double scalar)
static void	multiplyInPlace(double[] vec, double[] vec2)
static double[]	normalize(double[] vec)
static void	normalizeInPlace(double[] vec)
static double	rSqr(double[] y, double[] yhat) Calcuate the R^2 (coefficient of determination) for an estimator
static double[]	scale(double[] v, double s)
static void	scaleInPlace(double[] v, double s)
static double[]	subtract(double[] lhs, double rhs)
static double[]	subtract(double[] lhs, double[] rhs)
static double	SumSquaredResiduals(double[] y, double[] yhat) Calculate the sum of squared residuals between predicted and actual values

Methods inherited from class java.lang.Object

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

Constructor Detail

Functions

public Functions()

Method Detail

rSqr

public static double rSqr(double[] y,
                          double[] yhat)

Calcuate the R^2 (coefficient of determination) for an estimator

Parameters:

y - the original values of the variable

yhat - the estimated values of the variable by some measure

Returns:

SumSquaredResiduals

public static double SumSquaredResiduals(double[] y,
                                         double[] yhat)

Calculate the sum of squared residuals between predicted and actual values

Parameters:

y - the original values of the dependent

yhat - the estimated values by the regression

Returns:

sum of squared residuals

dotProduct

public static double dotProduct(double[] left,
                                double[] right)

Return the inner (dot) product for two vectors

Parameters:

left - first vector

right - second vector

Returns:

inner product

Throws:

BigMatException - if the two vectors are no the same length

scale

public static double[] scale(double[] v,
                             double s)

scaleInPlace

public static void scaleInPlace(double[] v,
                                double s)

normalize

public static double[] normalize(double[] vec)

normalizeInPlace

public static void normalizeInPlace(double[] vec)

subtract

public static double[] subtract(double[] lhs,
                                double[] rhs)

subtract

public static double[] subtract(double[] lhs,
                                double rhs)

magnitude

public static double magnitude(double[] vec)

multiplyInPlace

public static void multiplyInPlace(double[] vec,
                                   double[] vec2)

multiplyInPlace

public static void multiplyInPlace(double[] vec,
                                   double scalar)

multiply

public static double[] multiply(double[] vec,
                                double scalar)

main

public static void main(java.lang.String[] args)