rBeta function

Random generator from the beta distribution

The function generates random values from the beta distribution with a mean-precision parameterization, or from the augmented beta distribution.

rBeta(n, mu, phi, q0 = NULL, q1 = NULL)

Arguments

• n: the number of values to generate. If length(n) > 1, the length is taken to be the number required.
• mu: the mean parameter. It must lie in (0, 1).
• phi: the precision parameter. It must be a real positive value.
• q0: the probability of augmentation in zero. It must lie in (0, 1). In case of no augmentation, it is NULL (default).
• q1: the probability of augmentation in one. It must lie in (0, 1). In case of no augmentation, it is NULL (default).

Returns

A vector of length n.

Examples

rBeta(n = 100, mu = .5, phi = 30)
rBeta(n = 100, mu = .5, phi = 30, q0 = .2, q1 = .1)

References

Ferrari, S.L.P., Cribari-Neto, F. (2004). Beta Regression for Modeling Rates and Proportions. Journal of Applied Statistics, 31 (7), 799--815. doi:10.1080/0266476042000214501