n> poly(j, degree = poly_degree, raw = TRUE)3:as.factor(cal_time)10  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                                        2.412e-03  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> poly(j, degree = poly_degree, raw = TRUE)1:as.factor(cal_time)11  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                                        2.087e+01  </span>
<span class="r-out co"><span class="r-pr">#&