topic Re: compare 2 date values in YYYY.WK format in SAS Data Management

compare 2 date values in YYYY.WK format

chirumalla — Mon, 16 May 2016 07:08:07 GMT

Hi,

I want compare 2 date values available in year.week format. Is there is any way to compare 2 date which one is bigger.

Call_week Dcall_week

2014.01 2014.02

2016.11 2016.10

2015.18 2015.20

Thanks.

Regards,

Rajesh

Re: compare 2 date values in YYYY.WK format

Reeza — Mon, 16 May 2016 07:09:25 GMT

Are the dates SAS dates, ie numeric with a date format?

Re: compare 2 date values in YYYY.WK format

chirumalla — Mon, 16 May 2016 07:16:19 GMT

Yes. Both are Numaric and best7. format

Re: compare 2 date values in YYYY.WK format

Reeza — Mon, 16 May 2016 07:30:21 GMT

BEST7 is not a date format, yyyy.wk would be a date format.

Regardless, since the years/weeks are in chronological order you can compare the values directly.

In general, it's best to create a SAS date to do comparisons.

Re: compare 2 date values in YYYY.WK format

chirumalla — Mon, 16 May 2016 07:43:03 GMT

Sorry for the inconveniecne. Below is the format.

Call_week Dcall_week

2014.01 02.2014

2016.11 10.2016.

2015.18 20.2015

If it is possible to compare these two columns, could you please share the logic?

Re: compare 2 date values in YYYY.WK format

Loko — Mon, 16 May 2016 08:23:15 GMT

Hello,

If your variables are numeric (as you mentioned in a previous post) than you compare them as comparing 2 numbers:

e.g. if Call_week gt Dcall_week then new_var=Call_week;

If your variables are character you transform them into numeric variables using input function and the appropriate informat.

Here you can find the SAS INFORMATS BY CATEGORY

http://support.sas.com/documentation/cdl/en/lrdict/64316/HTML/default/viewer.htm#a001239776.htm

Afterwards the comparison will also resume to number comparing.

Re: compare 2 date values in YYYY.WK format

RW9 — Mon, 16 May 2016 08:25:47 GMT

Post some example data from your dataset - as a datastep so we can read it in directly as it is in your dataset. The reason is 02.2014 is not best7. format, it is either text or a Z type format. Also post what you want the output to look like, what do you mean compare? Difference in days/weeks/years, same month - its not clear from your post.

Re: compare 2 date values in YYYY.WK format

Reeza — Mon, 16 May 2016 10:34:33 GMT

@chirumalla wrote:

Sorry for the inconveniecne. Below is the format.

Call_week Dcall_week

2014.01   02.2014

2016.11   10.2016.

2015.18   20.2015

If it is possible to compare these two columns, could you please share the logic?

This is not the same as your original post and inconsistent with your answer regarding the variable type and format. Please confirm your data structure and variable types, preferably by posting the output from proc contents.