# fig7_2

## PURPOSE

Local Regression and Likelihood, Figure 7.2.

## SYNOPSIS

This is a script file.

## DESCRIPTION

     Local Regression and Likelihood, Figure 7.2.

     Conditional Hazard Rate Estimation.
     When hazard rate estimation is performed with multiple x variables,
     the result is an estimate of the conditional hazard rate for the
     first variable, given the levels of the remaining variables.

     The surface plot looks more dramatic than the contour plot in the book!

     Author: Catherine Loader

## CROSS-REFERENCE INFORMATION

This function calls:

- lfplot Plot (for one or two dimensions) a locfit() fit.
- locfit Smoothing noisy data using Local Regression and Likelihood.

This function is called by:

- runbook

## SOURCE CODE

    0001 % Local Regression and Likelihood, Figure 7.2.
    0002 %
    0003 % Conditional Hazard Rate Estimation.
    0004 % When hazard rate estimation is performed with multiple x variables,
    0005 % the result is an estimate of the conditional hazard rate for the
    0006 % first variable, given the levels of the remaining variables.
    0007 %
    0008 % The surface plot looks more dramatic than the contour plot in the book!
    0009 %
    0010 % Author: Catherine Loader
    0011
    0012 load livmet;
    0013 fit = locfit([t dm],'cens',1-z,'scale',0,'deg',1,'family','hazard','alpha',0.5,'xlim',[0 1;10000 20]);
    0014 figure('Name','fig7_2: Conditional hazard rate estimation' );
    0015 lfplot(fit);
    0016 xlabel('Survival Time (Months)');
    0017 ylabel('Diameter (c.m.)');
    0018 zlabel('Hazard Rate');