topic Re: How to calculate the week of the year! in SAS Programming

How to calculate the week of the year!

Rish — Mon, 10 Sep 2012 21:11:35 GMT

Hello Guru's;

I have a SAS date and want to convert it to week day of the year (for mulitple years).

For example 08JAN2009 show as '2 week of 2009'.

Can anybody please advise?

Thanks

Re: How to calculate the week of the year!

art297 — Mon, 10 Sep 2012 21:21:13 GMT

You could use the week function. i.e.:

WEEK( date <, 'descriptor'> )

returns the week of year from a SAS date value. The algorithm used to calculate the week depends on the descriptor.

If the descriptor is 'U,' weeks start on Sunday and the range is to . If weeks and exist, they are only partial weeks. Week 52 can be a partial week.

If the descriptor is 'V', the result is equivalent to the ISO 8601 week of year definition. The range is to . Week is a leap week. The first week of the year, Week , and the last week of the year, Week or , can include days in another Gregorian calendar year.

If the descriptor is 'W', weeks start on Monday and the range is to . If weeks and exist, they are only partial weeks. Week 52 can be a partial week.

Re: How to calculate the week of the year!

Rish — Mon, 10 Sep 2012 21:32:27 GMT

Arthur -

Tried to run the below code - giving error. Any advise please.

data xyz;

set web.pmrate (keep= customer datefield);

week(datefield, 'v');

run;

Thanks

Re: How to calculate the week of the year!

art297 — Mon, 10 Sep 2012 21:43:48 GMT

what version of SAS are you using and what was the error?

Re: How to calculate the week of the year!

Rish — Mon, 10 Sep 2012 21:51:18 GMT

Hi Arthur,

Following is the information:

SAS 9.2 version 4.3

error: undeclared array referenced; week.

error 22-322: syntax error, expecting one of the following: +, =.

error 76-322: syntax error, statement will be ignored.

Thanks

Re: How to calculate the week of the year!

art297 — Mon, 10 Sep 2012 22:48:31 GMT

Sorry, I just noticed your code. You never stipulated a variable for SAS to create. Try something like:

data xyz;

set web.pmrate (keep= customer datefield);

week=week(datefield, 'v');

run;