eha (version 1.4)

aftreg.fit: Parametric proportional hazards regression

Description

This function is called by aftreg, but it can also be directly called by a user.

Usage

aftreg.fit(X, Y, dist, strata, offset, init, shape, id, control,
center = NULL)

Arguments

X

The design (covariate) matrix.

Y

A survival object, the response.

dist

Which baseline distribution?

strata

A stratum variable.

offset

Offset.

init

Initial regression parameter values.

shape

If positive, a fixed value of the shape parameter in the distribution. Otherwise, the shape is estimated.

id

See corresponding argument to aftreg.

control

Controls convergence and output.

center

Is now deprecated. Centering is done internally, but results reported as if not.

Value

• coefficients
  Estimated regression coefficients plus estimated scale and shape coefficients, sorted by strata, if present.
• var
  Variance-covariance matrix
• loglik
  Vector of length 2. The first component is the maximized loglihood with only scale and shape in the model, the second the final maximum.
• score
  Score test statistic at initial values
• linear.predictors
  Linear predictors for each interval.
• means
  Means of the covariates
• conver
  TRUE if convergence
• fail
  TRUE if failure
• iter
  Number of Newton-Raphson iterates.
• n.strata
  The number of strata in the data.

Details

See aftreg for more detail.

See Also

aftreg