How to use TimedCalculate and RecordedValuesByCount Methods?

Discussion created by msnelson on Apr 2, 2013

I would be grateful for some schooling...  I am trying to pull in the last 20 values of a pi tag and then grab the values of another pi tag at the time stamps of the first pi tag.  I then want to calculate the difference in the 2 pi tag values at each time and finally calculate an average of these differences.  To do this I thought I would use the .recordedvaluesbycount and .timedcalculate.  I am having trouble using the help files for the sdk examples in my ACE environment.  I have attached a screen shot of my code.  Hopefully I am close?