                            2.628e+03  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                             as.factor(cal_time)8  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                                       -1.647e+02  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                             as.factor(cal_time)9  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                    