                                           -2.003e+03  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                            as.factor(cal_time)12  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                                       -3.882e+03  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                            as.factor(cal_time)13  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>    