Get the times at which the model will be evaluated

## Arguments

- x
object of class mrgmod

- ...
passed on

## Value

a sorted vector of unique times

## Details

Simulation times include the sequence of times created from
`start`

, `end`

, and `delta`

and the vector of times
found in `add`

. Making `end`

negative will omit any
`start`

/ `end`

/ `delta`

sequence. Negative values
are discarded from the result.

## Examples

```
## example("stime", package="mrgsolve")
mod <- mrgsolve::house(end=12, delta=2, add=c(11,13,15))
stime(mod)
#> [1] 0 2 4 6 8 10 11 12 13 15
```