rvbeta | R Documentation |
rvbeta
generates a random vector from the beta sampling model;
rvbeta(n = 1, shape1, shape2)
n |
integer, number of random variables to generate |
shape1 |
positive number or rv, 1st shape parameter |
shape2 |
positive number or rv, 2nd shape parameter |
rvnbeta(n, a, b)
("neutral" Beta distribution) is equivalent to
rvbeta(n, 1/3+a, 1/3+b)
.
Jouni Kerman jouni@kerman.com
Kerman, J. and Gelman, A. (2007). Manipulating and Summarizing Posterior Simulations Using Random Variable Objects. Statistics and Computing 17:3, 235-244.
See also vignette("rv")
.
n <- 12 # sample size y <- (0:(n-1)) # observations a <- b <- 1/3 # the neutral beta prior rvbeta(1, shape1=a+y, shape2=b+n-y) rvnbeta(1, shape1=y, shape2=n-y)
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