       -2.135e+02  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> poly(j, degree = poly_degree, raw = TRUE)2:as.factor(cal_time)17  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                                        4.829e-01  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> poly(j, degree = poly_degree, raw = TRUE)3:as.factor(cal_time)17  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                        