Created
August 21, 2018 07:16
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Model observed proportions as Beta distributed with JAGS
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| # Some test data for proportions with mean 0.4 | |
| p <- rbeta(20, 4, 6) | |
| # JAGS model | |
| modelTxt <- "model { | |
| for(i in 1:length(p)) { | |
| p[i] ~ dbeta(alpha, beta) | |
| } | |
| alpha <- mu * phi | |
| beta <- (1-mu) * phi | |
| logit(mu) <- a0 | |
| phi ~ dexp(0.1) | |
| a0 ~ dnorm(0, 1) | |
| }" | |
| model <- jags.model(textConnection(modelTxt), data = list(p=p)) | |
| sims <- coda.samples(model, c("a0", "mu", "phi"), n.iter = 5000) | |
| summary(sims) |
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