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SAS Dates, Times, and Interval Functions

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Posts: 5

SAS Dates, Times, and Interval Functions

When trying to use the interval function (intnx) to calculate the dates for the Monday of the previous 4 weeks based upon todays date, I am being returned a spureous date for week3.

Select Data:

Today = today()
Week1 = INTNX('week1.2',today(),0)
Week2 = INTNX('week2.2',today(),0)
Week3 = INTNX('week3.2',today(),0)
Week4 = INTNX('week4.2',today(),0)


Today = 02/06/2010
Week1 = 31/05/2010
Week2 = 24/05/2010
Week3 = 31/05/2010 (should be 17/05/2010)
Week4 = 10/05/2010

Any ideas?


Len Harbottle
Super Contributor
Super Contributor
Posts: 3,176

Re: SAS Dates, Times, and Interval Functions

Posted in reply to LenHarbottle
Suggest you review the SAS INTNX DOC on how you want to use the INTNX function with the WEEK value and a "multiple" *AND* and a "shift-index". Possibly you want to be incrementing (actually it would be decrementing) argument #3 instead for a prior period start date? Maybe it would be helpful to explain what you are trying to accomplish with the SAS expressions?

Scott Barry
SBBWorks, Inc.
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