bers of tests in many
(e.g. dozens) different conditions. Here “conditions” can mean many
different things: it could be different tissues (as in Urbut et al), or
different time points, or different treatments, or even different
phenotypes (think of testing multiple phenotypes at many genetic
variants in a GWAS).</p>
<p>There are essentially four steps to a mash analysis</p>
<ul>
<li>Read in the data</li>
<li>Set up the covariance matrices to be used</li>
<li>Fit the model</li>
<li>Extract posterior sum