IBM SPSS COMPLEX SAMPLES 19 manual Options

90

Chapter 12

Options

Figure 12-12

Cox Regression dialog box, Options tab

Estimation. These controls specify criteria for estimation of regression coefficients.

„Maximum Iterations. The maximum number of iterations the algorithm will execute. Specify a non-negative integer.

„Maximum Step-Halving.At each iteration, the step size is reduced by a factor of 0.5 until the log-likelihood increases or maximum step-halving is reached. Specify a positive integer.

„Limit iterations based on change in parameter estimates. When selected, the algorithm stops after an iteration in which the absolute or relative change in the parameter estimates is less than the value specified, which must be positive.

„Limit iterations based on change in log-likelihood. When selected, the algorithm stops after an iteration in which the absolute or relative change in the log-likelihood function is less than the value specified, which must be positive.

„Display iteration history. Displays the iteration history for the parameter estimates and pseudo log-likelihood and prints the last evaluation of the change in parameter estimates and pseudo log-likelihood. The iteration history table prints every n iterations beginning with the 0th