a2p {durmod} | R Documentation |
mphcrm
parametrizes the probabilities that it optimizes.
For n+1 probabilities there are n parameters a_j, such that
probability P_i = \frac{a_i}{∑_j \exp(a_j)}, where we assume that a_0 = 0.
a2p(a) p2a(p)
a |
a vector of parameters |
p |
a vector of probabilities with sum(p) = 1 |
a2p
returns a vector probabilities with sum 1.
p2a
returns a vector of parameters.
# Draw 5 parameters a <- rnorm(5) a # make 6 probabilities p <- a2p(a) p # convert back p2a(p)