ss='output co'>#&gt; <span class='message'>Joining, by = "Area.of.residence"</span></div><div class='output co'>#&gt; <span class='warning'>Warning: Column `Area.of.residence` joining character vector and factor, coercing into character vector</span></div><div class='output co'>#&gt; <span class='message'>Joining, by = "Area.of.workplace"</span></div><div class='output co'>#&gt; <span class='warning'>Warning: Column `Area.of.workplace` joining character vector and factor, coercing into character vector</spa