_arms” list I see in some Policies?</h2>
<p>In many of contextual’s Policy’s set_parameters() initialisation function, a parameter list is being assigned to a “self$theta_to_arms”. But the parameters themselves are later only available through self$theta.</p>
<p>The following source code comments how this little helper variable is used:</p>
<div class="sourceCode" id="cb1"><html><body><pre class="r"><span class="no">EpsilonFirstPolicy</span>              <span class="kw">&lt;-</span> <span class="