rvar_is_finite: Special value predicates for random variables
Description
Compute special value predicates (checking for finite / infinite values, NaN, and NA)
on all draws within a random variable, returning a random variable.
These functions return a new rvar that is the result of applying
is.finite(), is.infinite(), is.nan(), or is.na() to every draw
in the input random variable.
See Also
rvar-summaries-over-draws for summary functions across draws, including
implementations of is.finite(), is.infinite(), is.nan(), and is.na() for
rvars.