# KTH\$1LARGEST\$1UNIQUE
<a name="recipe-actions.functions.KTH_LARGEST_UNIQUE"></a>

 Returns the *k*th largest unique number from the selected source columns in a new column.

**Parameters**
+ `sourceColumns` – A JSON-encoded string representing a list of existing columns.
+ `targetColumn` – A name for the newly created column.

  `value` – A number representing *k*.

**Example**  
  

```
{
    "RecipeAction": {
        "Operation": "KTH_LARGEST_UNIQUE",
        "Parameters": {
            "sourceColumns": "[\"age\",\"height_cm\",\"weight_kg\"]",
            "targetColumn": "KTH_LARGEST_UNIQUE Column 1",
            "value": "3"
        }
    }
}
```