de> column for future
references.</p></dd>


<dt>.formula</dt>
<dd><p>A formula specifying the relationship between the exposure
variable and the covariates. For example, w ~ I(cf1^2) + cf2.</p></dd>


<dt>gps_density</dt>
<dd><p>Model type which is used for estimating GPS value,
including <code>normal</code> (default) and <code>kernel</code>.</p></dd>


<dt>sl_lib</dt>
<dd><p>A vector of prediction algorithms to be used by the
SuperLearner packageg.</p></dd>


<dt>...</dt>
<dd><p>Additional arguments passe