why did i get error of "The function or variable 'smoothtrajectory' is not recognized" of automated driving toolbox

I can use trajectory function ,but I cannot use smoothtrajectory function. Is this function cannot use in 2020a matlab?

Answer 1

[Cris LaPierre]

If you scroll to the bottom of the documentation page, you can usually see when a particular function was introduced. For smoothtrajectory, you can see that it was introduced in R2021a.