Function builtin_dbinom 

fn builtin_dbinom(
    args: &[RValue],
    named: &[(String, RValue)],
) -> Result<RValue, RError>

Binomial density (probability mass) function.

dbinom(x, size, prob) = choose(size, x) * prob^x * (1-prob)^(size-x)

@param x quantile vector (integer values) @param size number of trials @param prob probability of success on each trial @return numeric vector of probabilities