Function builtin_qgeom 

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

Geometric quantile function (inverse CDF).

qgeom(p, prob) = ceil(log(1-p) / log(1-prob)) - 1

@param p probability vector @param prob probability of success @return numeric vector of quantiles