You could create a summary index based on a report of the events in the first index and then create a chart based on the values in the summary index. If your summary index needs particular processing that is not possible with standard SPL, you could write your own custom command (in python) and feed the events from the first index to that before writing the results to the summary index.
Thank you for your feedback @ITWhisperer
You could create a summary index based on a report of the events in the first index and then create a chart based on the values in the summary index. If your summary index needs particular processing that is not possible with standard SPL, you could write your own custom command (in python) and feed the events from the first index to that before writing the results to the summary index.