For a given distribution name, such as "norm", checks to see whether or not p/d/q functions all exist for that distribution -- such as pnorm(), dnorm(), and qnorm(). Methods for eval_cdf(), eval_quantile(), and eval_density/mass() suffice as alternatives. Internal function.

pdq_functions_exist(name)

## Arguments

name

Name of the distribution; suffix to p/d/q.

## Value

TRUE if p/d/q functions are all available for this distribution; FALSE otherwise.