Total Contribution is not near to 100%

[eijii777]

Hello! Currently, I'm trying to apportion sulfate sources in aerosol samples based on δ34S value. However, when I add up the proportional contribution of all the sources, I only get the total contribution in the range of 75% - 82%, it is even not near to 99%. I'm not really sure why this is happening. Does anybody have the same experience and how to deal with it? Any advice will be really appreciated. Thank you.

[brianstock]

Are you looking at means? Medians? They won't necessarily add to 100%. But every mcmc draw should add to 100%, and you can confirm this by summing rows of ´p.global´, ´p.fac1´, etc.

apply(jags.1$BUGSoutput$sims.list$p.global, 1, sum) # row sums (MCMC draws, across sources) should all be 1

See http://brianstock.github.io/MixSIAR/articles/modify_output.html for directly accessing the MCMC draws.