></code> functions will result in an error when `fnctl = hazard`.</p>
<p>Note that the only possible link function in `regress` with `fnctl = odds"` is the logit link. 
Similarly, the only possible link function in `regress` with `fnctl = "rate"` is the log link.</p>
<p>Objects created using the
<code><a href="U.html">U</a></code> function can also be passed in. If the
<code><a href="U.html">U</a></code> call involves a partial formula of the form
<code>~ var1 + var2</code>, then <code>regress</code> will r