                    7.416e+02  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                             as.factor(cal_time)6  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                                       -1.630e+03  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                                             as.factor(cal_time)7  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                            