e modified matrix of counts.</p></dd>

  <dt><code>designmat</code></dt>
<dd><p>The design matrix of variables used to simulate
      signal. This is made by column-binding <code>design_fixed</code> and the
      permuted version of <code>design_perm</code>.</p></dd>

  <dt><code>coefmat</code></dt>
<dd><p>A matrix of coefficients corresponding to
      <code>designmat</code>.</p></dd>

  <dt><code>design_obs</code></dt>
<dd><p>Additional variables that should be included in
      your design matrix in down