> The following objects are masked from data:</span>
<span class="r-msg co"><span class="r-pr">#&gt;</span> </span>
<span class="r-msg co"><span class="r-pr">#&gt;</span>     age, educ, income</span>
<span class="r-msg co"><span class="r-pr">#&gt;</span> The following objects are masked from data3:</span>
<span class="r-msg co"><span class="r-pr">#&gt;</span> </span>
<span class="r-msg co"><span class="r-pr">#&gt;</span>     age, educ, income</span>
<span class="r-msg co"><span class="r-pr">#&gt;</span> The