topic Re: How to get week1 week2 week3 week4 based on date in SAS Programming

How to get week1 week2 week3 week4 based on date

Beto16 — Thu, 26 May 2016 14:50:23 GMT

Hi I have a table that has a date column I need to determine what week out of the month was it week1 week2 week3 week4...enclose is a sample of what I have an what I need it to look

Id. Date
A1. 01/01/16
A2. 01/16/16
A1. 01/26/16

Want
Id. Date. Week
A1. 01/01/16. Week1
A2. 01/16/16. Week2
A1. 01/26/16. Week4

thanks in advance

Re: How to get week1 week2 week3 week4 based on date

ballardw — Thu, 26 May 2016 14:59:39 GMT

There are, believe it or not, several of definitons for "week" when it comes to use.

Does your "week" start on Sunday, Monday or some other day? Or is week the first 7 days of a month regardless of starting day of the week?

Does it count as week one if there is only one day in that week? 2 days? 3 days?

Re: How to get week1 week2 week3 week4 based on date

Haris — Thu, 26 May 2016 15:08:39 GMT

Seems like what you want is to extract the day of the month, divide that by 7 and take the ceiling of the result:

DayMo = Day(Date);

WeekMo = ceil(DayMo/7);

But that would get you week3 for January 16, not week2

Re: How to get week1 week2 week3 week4 based on date

ballardw — Thu, 26 May 2016 18:56:30 GMT

The definition is pretty critical as you are saying that 1/16/2016 is in week 2 bu tis the 3rd Saturday of January 2016 while 1/1/2016 is in week 1 as the first Friday. So are the dates between 3 and 9 january week 1 or week2?