dlpl function

First derivative of the Log Partial Likelihood.

Calculates the first partial derivative of the log partial likelihood with respect to the linear predictor.

dlpl(event, b, X, Ri, Ci)

Arguments

• event: non-censoring event indicator.
• b: vector of regression coefficients
• X: design matrix
• Ri: list of length n with vectors as list elements, with the i-th element being the riskset belonging to the i-th spell.
• Ci: list of length n with vectors as list elements, with the i-th element capturing the indexes of risksets in which spell i is included.

Details

This function calculates the first derivative of the log partial likelihood of a Cox type multistate model.

Returns

A vector with the values of the partial first derivatives of the log partial likelihood with respect to the regression effects.

Author(s)

Holger Reulen

Examples

## Not run: dlpl(event, b, X, Ri, Ci)