Updated 3.2 Column operations (markdown)

3.2-Column-operations.md

@@ -111,6 +111,29 @@ var tfConfig = {
 };</pre>
         </td>
     </tr>    
+    <tr>
+        <th>format_result</th>
+        <td>array</td>
+        <td>list of format objects used for formatting operation results</td>
+        <td>
+           refer to https://github.com/componitable/format-number to check the configuration options.
+           By default, `ColOps` will match the current number format in terms of thousands and decimal 
+           separators based on the column type, (`number` or `formatted-number`)
+        </td>
+        <td>
+            <pre>
+var tfConfig = { 
+    extensions: [{ 
+        name: 'colOps',
+        id: ['col2Total', 'col4Mean'],
+        col: [2, 4],
+        operation: ['sum', 'mean'],
+        write_method: ['innerHTML', 'setValue'],
+        format_result: [{ prefix: '$' }, { suffix: '/unit' }]
+    }]
+};</pre>
+        </td>
+    </tr>
     <tr>
       <th>exclude_row</th>
       <td>array</td>