Edit the Data Preparation Script
You can edit the data transformation changes added to the Preparation Script.
Both before and after you’ve executed Apply Script, you can edit the data transformation steps. The edit option isn't available for all types of transform steps. If you’re editing the steps after executing Apply Script, you must re-apply the script to the entire data set. If you don't save the updates to a step and navigate to another step, a warning message is displayed indicating that you haven’t saved the changes.
The updates to the columns are applied only to the data set and not to the visualization. To ensure that you see the most up-to-date data, on the Visualize canvas, click Refresh Data.