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Excellent fit, zero convergence hierarchical dirichlet model in JAGS

I am fitting a hierarchical dirichlet model to some data in JAGS. My samples (referred to as cores in the code) are observations of the relative abundance of 3 ...
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131 views

How to specify a zero-inflated Dirichlet model in JAGS/BUGS

There was a recent publication discussing the advantages of the zero-inflated dirichlet for microbiome count data which is compositional (you are modeling a matrix of species relative abundance data ...
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229 views

Trouble specifying a hierarchical dirichlet model in JAGS

I have a sampling design where samples (cores) are taken within plots. Those plots are then nested within sites. There are multiple sites. I would like to get a hierarchical site-level estimate of ...
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1answer
346 views

Convergence issue dirichlet model JAGS, implemented in R

I have data on the relative abundances of 3 species, stored in the matrix r.spp.y. Species 1 has a negative relationship with the variable ...
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39 views

Measuring covariance among multiple y-variables using a dirlichet model, implemented in JAGS in R

I have data on 3 species abundances as fractional compositions. Within each sample, the sum of all species abundances is 1. Essentially, each observation is a proportional abundance. Here is an ...
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2k views

RJAGS Multinomial-Dirichlet – Observed node inconsistent with unobserved parents at initialization

I am trying to model a simple 2x2 contingency table with a multinomial-Dirichlet model. A snippet of my data z[i,1:4] look like this: ...