bijfit
Class DesignMatrixGamma

java.lang.Object
  bijfit.DesignMatrix
      bijfit.DesignMatrixGamma

public class DesignMatrixGamma
extends DesignMatrix

Design Matrix for gamma variate model, to be used in GeneralLeastSquares estimation. As described by Madsen, 1992 Gamma variate y(t) = A(t-t0)^alpha exp(-(t - t0) / beta) can be rewritten as y(t') = ymax t' ^ alpha exp(alpha(1 - t')) where t' = (t-t0) / (tmax - t0) and tmax is the t where y(t) = max. Linear form: ln(y(t')) = ln(ymax) + alpha(1 + ln(t') - t')) Copyright (c) 1999-2003, Michael Abramoff. All rights reserved.

Constructor Summary

DesignMatrixGamma(float[] t, float tmax, float t0)
Create a design matrix for the derived gamma variate function.

Method Summary

Methods inherited from class bijfit.DesignMatrix

getMatrix, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DesignMatrixGamma

public DesignMatrixGamma(float[] t,
                         float tmax,
                         float t0)

Create a design matrix for the derived gamma variate function.

Parameters:

t - the time stamps.

tmax - the time at which the curve reaches maximum height.