Package com.imsl.test.example.stat

Class ProportionalHazardsEx1

java.lang.Object

com.imsl.test.example.stat.ProportionalHazardsEx1

public class ProportionalHazardsEx1
extends Object

Performs proportional-hazards data analysis on lung cancer data.

The following example is taken from Lawless (1982, page 287) and involves the survival of lung cancer patients based upon their initial tumor types and treatment type. In the example, the likelihood is maximized with no strata present in the data. This corresponds to Example 7.2.3 in Lawless (1982, page 367). The model is given as:

$$\mathrm{ln}(\lambda)=\beta_1x_1+\beta_2x_2+\beta_3x_3+\alpha_i+\gamma_j$$

where \(\alpha_i\) and \(\gamma_j\) correspond to dummy variables generated from classification variables in columns 5 and 6 of x. Respectively, \(x_1\) corresponds to column index 2, \(x_2\) corresponds to column index 3, and \(x_3\) corresponds to column index 4 of x. Column 0 of x contains the response and column 1 of x contains the censoring code. Logging is used to print output statistics.

See Also:

• Code
• Output

Constructor Summary

Constructors

Constructor	Description
ProportionalHazardsEx1()

Method Summary

Modifier and Type	Method	Description
static void	main(String[] args)

Methods inherited from class java.lang.Object

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

Constructor Details

ProportionalHazardsEx1

public ProportionalHazardsEx1()

Method Details

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception