--- a/main_macros.xml	Tue Jun 05 06:47:34 2018 -0400
+++ b/main_macros.xml	Wed Jun 06 17:44:08 2018 -0400
@@ -7,6 +7,9 @@
   if c_option == 'by_index_number':
     cols = list(map(lambda x: x - 1, c))
     data = data.iloc[:,cols]
+  if c_option == 'all_but_by_index_number':
+    cols = list(map(lambda x: x - 1, c))
+    data.drop(data.columns[cols], axis=1, inplace=True)
   y = data.values
   if return_df:
     return y, data
@@ -443,16 +446,17 @@
   <xml name="samples_column_selector_options" token_column_option="selected_column_selector_option" token_col_name="col1" token_multiple="False" token_infile="infile1">
     <param name="@COLUMN_OPTION@" type="select" label="Choose how to select data by column:">
       <option value="by_index_number" selected="true">Select columns by column index number(s)</option>
-      <!--
-      <option value="by_header_name">Select columns by column header name(s)</option>
+      <!--<option value="by_header_name">Select columns by column header name(s)</option>-->
       <option value="all_but_by_index_number">All columns but by column index number(s)</option>
-      <option value="all_but_by_header_name">All columns but by column header name(s)</option> 
-      -->
+      <!--<option value="all_but_by_header_name">All columns but by column header name(s)</option> -->
       <option value="all_columns">All columns</option>
     </param>
     <when value="by_index_number">
       <param name="@COL_NAME@" multiple="@MULTIPLE@" type="data_column" data_ref="@INFILE@" label="Select target column(s):"/>
     </when>
+    <when value="all_but_by_index_number">
+      <param name="@COL_NAME@" multiple="@MULTIPLE@" type="data_column" data_ref="@INFILE@" label="Select target column(s):"/>
+    </when>
     <when value="all_columns">
     </when>
   </xml>