Brian Stock

3000 posterior draws, which you can summarize (mean, median, mode, SD) or plot (eg histogram, density, box plot) as you like. See that when you do these yourself they match...

Have you tried ``` jags.mod[[9]]

Yes, you can get all the MCMC draws, see http://brianstock.github.io/MixSIAR/articles/modify_output.html. If you include individual as a factor then you'll get predicted proportion by individual. Since you already have 2 factors...

Yes you should have access to all the MCMC draws to get the source proportions by age as in the plot. I don't remember the easiest way to do this...