Construct a multi-state model from a set of parametric survival models

## Arguments

- ...
Objects returned by

`flexsurvreg`

or`flexsurvspline`

representing fitted survival models.- trans
A matrix of integers specifying which models correspond to which transitions. The \(r,s\) entry is

`i`

if the \(i\)th argument specified in`...`

is the model for the state \(r\) to state \(s\) transition. The entry should be`NA`

if the transition is disallowed.

## Value

A list containing the objects given in `...`

, and with
attributes `"trans"`

and `"statenames"`

defining the transition
structure matrix and state names, and with list components named to
describe the transitions they correspond to. If any of the arguments in

`...`

are named, then these are used to define the transition names,
otherwise default names are chosen based on the state names.