check_input_vec is a helper function for model_trend,
ind_init, statespace_ed and statespace_ch.
It checks whether the time object is an integer vector. If not (a vector
OR integer) it will return an error message.
check_input_vec(x, vec_name)
| x | An R object, which should be a numeric vector. |
|---|---|
| vec_name | The name of the input object for the error message. |
The function returns the checked input vector unchanged.