Randomly create some irregular functional data from regular ones.
**jiggle** it by randomly moving around its `arg`

-values. Only for `tfd`

.
**sparsify** it by setting (100*`dropout`

)% of its values to `NA`

.

## Arguments

- f
a

`tfd`

object- amount
how far away from original grid points can the new grid points lie, at most (relative to original distance to neighboring grid points). Defaults to at most 40% (0.4) of the original grid distances. Must be lower than 0.5

- ...
additional args for the returned

`tfd`

in`tf_jiggle`

- dropout
how many values of

`f`

to drop, defaults to 50%.