re variables: Land_Contour &lt;fct&gt;,
## #   Utilities &lt;fct&gt;, Lot_Config &lt;fct&gt;, Land_Slope &lt;fct&gt;, Neighborhood &lt;fct&gt;,
## #   Condition_1 &lt;fct&gt;, Condition_2 &lt;fct&gt;, Bldg_Type &lt;fct&gt;, House_Style &lt;fct&gt;,
## #   Overall_Qual &lt;fct&gt;, Overall_Cond &lt;fct&gt;, Year_Built &lt;int&gt;,
## #   Year_Remod_Add &lt;int&gt;, Roof_Style &lt;fct&gt;, Roof_Matl &lt;fct&gt;,
## #   Exterior_1st &lt;fct&gt;, Exterior_2nd &lt;fct&gt;, Mas_Vnr_Type &lt;fct&gt;,
## #   Mas_Vn