Description Usage Arguments Details Value Author(s) References See Also

The logLik function for survival models

1 2 3 4 |

`object` |
the result of a |

`...` |
optional arguments for other instances of the method |

The logLik function is used by summary functions in R such as
`AIC`

.
For a Cox model, this method returns the partial likelihood.
The number of degrees of freedom (df) used by the fit and the effective
number of observations (nobs) are added as attributes.
Per Raftery and others, the effective number of observations is the
taken to be the number of events in the data set.

For a `survreg`

model the proper value for the effective number
of observations is still an open question (at least to this author).
For right censored data the approach of `logLik.coxph`

is the
possible the most sensible, but for interval censored observations
the result is unclear. The code currently does not add a *nobs*
attribute.

an object of class `logLik`

Terry Therneau

Robert E. Kass and Adrian E. Raftery (1995). "Bayes Factors". J. American Statistical Assoc. 90 (430): 791.

Raftery A.E. (1995), "Bayesian Model Selection in Social Research", Sociological methodology, 111-196.

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.