n>
<span class="r-out co"><span class="r-pr">#&gt;</span>  $ yrsallst: int  9 2 0 0 0 2 0 0 0 0 ...</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  $ hispan  : int  0 0 0 0 0 0 1 0 1 0 ...</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  $ black   : int  0 1 0 0 1 1 0 0 0 1 ...</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  $ whitepop: num  5772110 5772110 5772110 5772110 5772110 ...</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  $ blackpop: num  