getPrior_delta {eggCounts} | R Documentation |
Compute the shape parameters from a Beta distribution for \delta
based on some prior belief.
getPrior_delta(lower, upper, p = 0.7, mode, conc, plot = TRUE)
lower,upper,p |
numeric. Prior belief about the reduction. There is |
mode,conc |
numeric. Prior belief about the reduction. The mode and concentration parameters of a beta distribution. Higher concentration indicates smaller variance. Not used if |
plot |
logical. If TRUE, the prior distribution is plotted after parameters are found. |
The multiroot
function from rootSolve package is used to compute the parameters.
Returns Beta prior parameters for \delta
and the printed argument to use in a fecr_stan()
or a fec_stan()
function call.
Tea Isler
Craig Wang
# there is 80% probability that the reduction is between 60% and 90%
getPrior_delta(lower = 0.6, upper = 0.9, p = 0.8)