first and last records within a specific date

[Ameurgen]

Hello gays,

need help , as new sas programmer , i am in phase to finish my project so, i need to create a variable accally a binary variable  from my date, this is a type of date who i dealing with 

ANM_id     lact_no   start_date             service_date               NNR

111              1          2013-01-06             2013-03-15

111              1          2013-01-06             2013-04-04

111              2          2014-01-10             2014-04-21

111              2          2014-01-10            2014-05-10

222              1          2015-10-01            2015-11-15

222              2          2016-01-01            2016-02-06

222              2         2016-01-01             2016-02-26

i need to assign 1  if within a specific period (56 days)  from start date there will be one or more service date less than 56 days , otherwise NRR = 0  if there are a service after 56 days.

Thank all

Regards

[ballardw]

You should show some worked examples.

I am having a hard time following which values are compared for this: "i need to assign 1 if within a specific period (56 days) from start date there will be one or more service date less than 56 days , otherwise NRR = 0 if there are a service after 56 days."

Are you intending to use only the service_date for each observation or compare other dates?

IF your start_date and service_date are actual SAS date values you can get the number of days by either subtraction or the Intck function and the interval of days:

Days_between = service_date  - start_date;

or

Days_between= intck('day',start_date,service_date);

[Kurt_Bremser]

nnr = (0 <= (service_date - start_date) <= 56);

Assuming that your date values are stored as SAS date values.

For complete, tested code supply example data in a data step with datalines, so we can create an exact replica of your dataset with a simple copy/paste and submit.