ode>X</code> is a large, sparse matrix. When
not specified, the most suitable version is called depending on
whether <code>X</code> is dense or sparse.</p></dd>
</dl></div>
    <div id="value">
    <h2>Value</h2>
    <p>A numeric vector with one entry per row of <code>X</code>.</p>
    </div>
    <div id="details">
    <h2>Details</h2>
    <p>Function <code>cost</code> computes loss functions proportional
  to the negative log-likelihoods, and is mainly for internal use to
  quickly compute log-likelihoods 