   -9.052e-04  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                             as.factor(cal_time)2  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                                       -7.137e+01  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                             as.factor(cal_time)3  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                            