Percent difference from previous period

[dstephens22]

Can someone explain why this results in all nulls?  It's a "Percent difference from previous period" but I am not using _month_, I and using _inferred_.  It's a week over week calculation.  I can seem to find an answer.

Thanks, Dave

This is the code produced by SAS VA.

( RelativePeriod(_Sum_, 'Pageviews'n, _IgnoreAllTimeFrameFilters_
, 'EndDate'n, _Inferred_, 0, _Full_, {Date}) - RelativePeriod(
_Sum_, 'Pageviews'n, _IgnoreAllTimeFrameFilters_, 'EndDate'n,
_Inferred_, -1, _Full_, {Date}) ) / Abs(RelativePeriod(_Sum_,
'Pageviews'n, _IgnoreAllTimeFrameFilters_, 'EndDate'n, _Inferred_
, -1, _Full_, {Date}))

[dstephens22]

BTW if i use _month_ it's fine. Does SAS VA not like days?

[Sam_SAS]

Hi Dave,

Day and Week intervals were not supported until the 8.3 release. Do you have a version of VA that is older than that?

Sam

[dstephens22]

Yes it's 7.5.  I swore I used this in previous versions.  Maybe before Flash was removed.  

Thanks for the info.  I'll hardcode on backend I guess.