metamorph.html#var-column-names">column-names</a> </li><li> <a href="tech.v3.dataset.metamorph.html#var-column-values-.3Ecategorical">column-values-&gt;categorical</a> </li><li> <a href="tech.v3.dataset.metamorph.html#var-columns">columns</a> </li><li> <a href="tech.v3.dataset.metamorph.html#var-columns-with-missing-seq">columns-with-missing-seq</a> </li><li> <a href="tech.v3.dataset.metamorph.html#var-columnwise-concat">columnwise-concat</a> </li><li> <a href="tech.v3.dataset.metamorph.html#var-concat">con