topic Re: Perform calculations on a count of EventTypes in Knowledge Management

Perform calculations on a count of EventTypes

sportauthority — Mon, 28 Sep 2020 13:13:36 GMT

I have having trouble performing basic calculations using Eval. I can do '2*2' but I cannot do this with a count of eventtype.

I have a search running, to total EventTypes that I created.

sourcetype=csv | timechart span="1d" , count(eval(eventtype="OC-Main Player_Loaded")) AS OC-Main-player-loaded, count(eval(eventtype="OC-Main User_Interacted")) AS OC-Main-User_Interacted

This creates a table, showing the time, and then a count of the EventTypes (in this case "OC-Main PlayerLoaded" and "OC-Main UserInteracted").

I want to create a 4th column, that would give me a calculation, based on these counts. What I want is a %, but at the moment I can't get anything to work.

If I add a simple Eval at the end, the result shows. eg... | eval ocper=(2*2) shows as 4
However, if I try and use the AS event names (eg: OC-Main-player-loaded) nothing shows.

My guess is, OC-Main-player-loaded is just the name of the table column, and splunk has no concept of what I am trying to multiply. I assume I need to specify that the count should be some sort of field that can be multiplied. How do I do this?

thanks in advanced.

Re: Perform calculations on a count of EventTypes

MHibbin — Mon, 04 Feb 2013 13:01:30 GMT

I would firstly try simplifying the names you are using the timechart command, and use something simple like:

OC-Main-player-loaded --> loaded

Then pipe to your eval command and use the simplified field labels in your calculation. I have had issues in the past with processing certain field names.

I would then pipe to rename to change the simplified field labels to something more legible.

Hope this helps.

Re: Perform calculations on a count of EventTypes

sportauthority — Mon, 04 Feb 2013 13:18:20 GMT

Ok, that works. thank you very much. It's probably something I should have tried about 4 hours ago. Instead I have been reading docs, trying examples, looking in the wiki. You live and learn! cheers!

Re: Perform calculations on a count of EventTypes

MHibbin — Mon, 04 Feb 2013 13:36:31 GMT

No problem, to close this question off, can you mark the answer as accepted with the empty tick beside the answer.

Thanks.