Description Usage Arguments Details Value Author(s) See Also

These are the the functions called by coxph that do the actual
computation.
In certain situations, e.g. a simulation, it may be advantageous to
call these directly rather than the usual `coxph`

call using
a model formula.

1 2 3 4 |

`x` |
Matix of predictors. This should |

`y` |
a |

`strata` |
a vector containing the stratification, or NULL |

`offset` |
optional offset vector |

`init` |
initial values for the coefficients |

`control` |
the result of a call to |

`weights` |
optional vector of weights |

`method` |
method for hanling ties, one of "breslow" or "efron" |

`rownames` |
this is only needed for a NULL model, in which case it contains the rownames (if any) of the original data. |

`resid` |
compute and return residuals. |

`nocenter` |
an optional list of values. Any column of the X matrix whose values lie strictly within that set will not be recentered. Note that the coxph function has (-1, 0, 1) as the default. |

This routine does no checking that arguments are the proper length or type. Only use it if you know what you are doing!

The `resid`

and `concordance`

arguments will save some compute
time for calling routines that only need the likelihood,
the generation of a permutation distribution for instance.

a list containing results of the fit

Terry Therneau

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