n class="r-pr">#&gt;</span>    de range scale </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   2.0   4.0   0.8 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $is_known</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>    de range scale </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> FALSE  TRUE  TRUE </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-ou