timechart with dynamic data series?

[yww325]

I found a document saying you can create multiple data series here:
http://docs.splunk.com/Documentation/Splunk/latest/Search/Chartmultipledataseries
But the number of data series is a fixed value, you have to specify these names and conditions for each of them.
In my case, let's assume we have a ReturnCode field and an AppName field in the search return, the return number could be any number.
I want to see a timely distribution, so I used time chart, and I also want data series group by AppName and ReturnCode, so now I use like | timechart count(eval(ReturnCode=1)) as 1, count(eval(ReturnCode=2)) as 2 by AppName
But I realize the ReturnCode can be totally different according to the application(AppName), for AppA, return code can be 1,2,3,4; for AppB, return code can be 2,3,5. I want one colored data series for each combination of AppName+ReturnCode in the timechart
How can I achieve that?

[yww325]

Yes, that will work, thank you.

[somesoni2 · Accepted solution]

Give this a try

your base search 
| eval App_RC=AppName.":".ReturnCode
| timechart count by App_RC

[niketn]

@yww325, I have converted @somesoni2 's comment to answer. Please accept to mark this as answered.
Also make sure you post your comments using Add comment for specific thread instead of posting a new answer.