PFS Survival Function for Different Transition Models

## Usage

```
survPFS(transition, t)
# S3 method for class 'ExponentialTransition'
survPFS(transition, t)
# S3 method for class 'WeibullTransition'
survPFS(transition, t)
# S3 method for class 'PWCTransition'
survPFS(transition, t)
```

## Arguments

- transition
(

`TransitionParameters`

)

see`exponential_transition()`

,`weibull_transition()`

or`piecewise_exponential()`

for details.- t
(

`numeric`

)

time at which the value of the PFS survival function is to be computed.

## Methods (by class)

`survPFS(ExponentialTransition)`

: Survival Function for an exponential transition model.`survPFS(WeibullTransition)`

: Survival Function for a Weibull transition model.`survPFS(PWCTransition)`

: Survival Function for a piecewise constant transition model.

## Examples

```
transition <- exponential_transition(h01 = 1.2, h02 = 1.5, h12 = 1.6)
survPFS(transition, 0.4)
#> [1] 0.3395955
transition <- exponential_transition(h01 = 1.2, h02 = 1.5, h12 = 1.6)
survPFS(transition, 0.4)
#> [1] 0.3395955
transition <- weibull_transition(h01 = 1.2, h02 = 1.5, h12 = 1.6, p01 = 2, p02 = 2.5, p12 = 3)
survPFS(transition, 0.4)
#> [1] 0.7090783
transition <- piecewise_exponential(
h01 = c(1, 1, 1), h02 = c(1.5, 0.5, 1), h12 = c(1, 1, 1),
pw01 = c(0, 3, 8), pw02 = c(0, 6, 7), pw12 = c(0, 8, 9)
)
survPFS(transition, 0.4)
#> [1] 0.3678794
```