lass='input'><span class='no'>iris</span> <span class='kw'>%&gt;%</span> <span class='fu'><a href='view.html'>view</a></span>(<span class='no'>iris_root</span>)</div><div class='output co'>#&gt; [1] 2.258318</div><div class='input'><span class='fu'>tryCatch</span>(<span class='no'>iris</span> <span class='kw'>%&gt;%</span> <span class='fu'><a href='set.html'>set</a></span>(<span class='no'>iris_root</span>, <span class='fl'>2</span>)
       , <span class='kw'>error</span> <span class='kw'>=</span> <span cla