coxsei (version 0.3)

CumInt: Cumulative intensity function

Description

Calculate the cumulative/integrated hazard/intensity function

Usage

CumInt(x, int, ...)

Arguments

x

the value at which to calculate the cumulative function value

int

the intensity/hazard rate function. Has to be vectorized.

…

the arguments to be passed in to control the behavior of the underlying integrate function.

Value

The value(s) of the cumulative hazard function at the specified x value(s).

Warning

The validity of the user supplied intensity function is not checked.

Details

Relies on the numerical integration routine of R.

Examples

# NOT RUN {
curve(CumInt(x,int=function(y)1*( y>=0 & y<2)+3*(y>=2 & y<3)+1*(y>=3)),
      0,5,xlab="t",ylab="H(t) of a piece-wise constant hazard fun h(t)")   
# }