topic Re: How to flag continous month? in SAS Programming

How to flag continous month?

TigerAn — Tue, 19 Dec 2017 19:31:32 GMT

I have a raw data and not sure how to flag if service_from_date is not a continuous month.

for example, from observation1-3, need flag=1; from observation 4-5, need flag=2; from observation 6-13, need flag=3.

observation 1-5 has a same provider, but there is a gap (not continuous) between observation 3 and 4.

MEMBER_ID	SERVICE_FROM_DATE	SERVICE_THROUGH_DATE	SERVICE_PROVIDER_ID
ABC	01/05/2017	01/05/2017	64058469
ABC	02/24/2017	02/24/2017	64058469
ABC	03/08/2017	03/08/2017	64058469
ABC	07/10/2017	07/10/2017	64058469
ABC	08/21/2017	08/21/2017	64058469
ABC	03/25/2017	03/25/2017	64089900
ABC	04/30/2017	04/30/2017	64089900
ABC	05/28/2017	05/28/2017	64089900
ABC	06/25/2017	06/25/2017	64089900
ABC	07/23/2017	07/23/2017	64089900
ABC	08/20/2017	08/20/2017	64089900
ABC	09/24/2017	09/24/2017	64089900
ABC	10/22/2017	10/22/2017	64089900

wanted results:

MEMBER_ID	START_DT	END__DT	SERVICE_PROVIDER_ID
ABC	01/05/2017	03/08/2017	64058469
ABC	07/10/2017	08/21/2017	64058469
ABC	03/25/2017	10/22/2017	64089900

Re: How to flag continous month?

ballardw — Tue, 19 Dec 2017 19:55:52 GMT

is your definition of "continuous" that the month of service_from_date is exactly one month after the service_through_date from the previous record when the member_id and service_provider_id are the same?

Since your results do not show any flag values it looks like you want to collapse the from and to period, correct?

Re: How to flag continous month?

novinosrin — Tue, 19 Dec 2017 20:36:51 GMT

data have;
input MEMBER_ID $ SERVICE_FROM_DATE :mmddyy10. SERVICE_THROUGH_DATE :mmddyy10. SERVICE_PROVIDER_ID $;
format SERVICE_FROM_DATE SERVICE_THROUGH_DATE mmddyy10.;
datalines;
ABC 01/05/2017 01/05/2017 64058469
ABC 02/24/2017 02/24/2017 64058469
ABC 03/08/2017 03/08/2017 64058469
ABC 07/10/2017 07/10/2017 64058469
ABC 08/21/2017 08/21/2017 64058469
ABC 03/25/2017 03/25/2017 64089900
ABC 04/30/2017 04/30/2017 64089900
ABC 05/28/2017 05/28/2017 64089900
ABC 06/25/2017 06/25/2017 64089900
ABC 07/23/2017 07/23/2017 64089900
ABC 08/20/2017 08/20/2017 64089900
ABC 09/24/2017 09/24/2017 64089900
ABC 10/22/2017 10/22/2017 64089900
;

data want;
do n=1 by 1 until(last.member_id);
set have;
by MEMBER_ID SERVICE_FROM_DATE notsorted;
if n=1 then _start_DATE=SERVICE_FROM_DATE;
array temp(100);
array _temp2(100);
k=month(SERVICE_FROM_DATE);
retain grp 1;
k1=dif(k);
if k1 not in (1,.) then
do;
grp+1;
temp(n-1)=_start_DATE;
_start_DATE=SERVICE_FROM_DATE;
_temp2(n)=n-1;
end;
*output;
end;
do n1= 1 by 1 until(last.member_id);
set have;
by MEMBER_ID SERVICE_FROM_DATE notsorted;
if n1 in _temp2 then
do;
start_date=temp(n1);
output;
end;
end;
if last.member_id then do;
start_date=_start_DATE;
output;
end;

format start_date _start_date mmddyy10.;
drop n temp: _temp: k: grp n:;
run;

sorry for lazy and unclean code, but you can. i'll see if i can clean after lunch. I am hungry

Re: How to flag continous month?

novinosrin — Tue, 19 Dec 2017 20:56:30 GMT

Better version:

NOTES: The code may require tweaking a bit as the service provider changes for the same member id. I trust if you are capable of maintaining this code, you certainly can tweak on your own. Nevertheless, should you face any discrepancies while testing, let me know. And of course, I am sure some super user will give a far better solution than this

data have;

input MEMBER_ID $ SERVICE_FROM_DATE :mmddyy10. SERVICE_THROUGH_DATE :mmddyy10. SERVICE_PROVIDER_ID $;

format SERVICE_FROM_DATE SERVICE_THROUGH_DATE mmddyy10.;

datalines;

ABC 01/05/2017 01/05/2017 64058469

ABC 02/24/2017 02/24/2017 64058469

ABC 03/08/2017 03/08/2017 64058469

ABC 07/10/2017 07/10/2017 64058469

ABC 08/21/2017 08/21/2017 64058469

ABC 03/25/2017 03/25/2017 64089900

ABC 04/30/2017 04/30/2017 64089900

ABC 05/28/2017 05/28/2017 64089900

ABC 06/25/2017 06/25/2017 64089900

ABC 07/23/2017 07/23/2017 64089900

ABC 08/20/2017 08/20/2017 64089900

ABC 09/24/2017 09/24/2017 64089900

ABC 10/22/2017 10/22/2017 64089900

;

data want(rename=(SERVICE_THROUGH_DATE=end_date));

retain MEMBER_ID start_date;

do _n=1 by 1 until(last.member_id);

set have;

by MEMBER_ID SERVICE_FROM_DATE notsorted;

if _n=1 then _start_DATE=SERVICE_FROM_DATE;

array temp(100) _temporary_;

array _temp2(100) _temporary_;

_k=month(SERVICE_FROM_DATE);

retain _grp 1;

_k1=dif(_k);

if _k1 not in (1,.) then

do;

_grp+1;

temp(_n-1)=_start_DATE;

_start_DATE=SERVICE_FROM_DATE;

_temp2(_n)=_n-1;

end;

do _n_= 1 by 1 until(last.member_id);

set have;

by MEMBER_ID SERVICE_FROM_DATE notsorted;

if _n_ in _temp2 then

do;

start_date=temp(_n_);

output;

end;

if last.member_id then

do;

start_date=_start_DATE;

output;

end;

format start_date mmddyy10.;

drop _: SERVICE_FROM_DATE;

run;

Re: How to flag continous month?

PeterClemmensen — Tue, 19 Dec 2017 21:47:41 GMT

If you have SAS/ETS do something like this, since the creation of START_DT and END_DT really only depends on looking 1 obs back and 1 ahead 🙂

proc expand data=have out=have_ll method=none;
   by SERVICE_PROVIDER_ID;
   id SERVICE_FROM_DATE;
   convert SERVICE_FROM_DATE=lead_SERVICE_FROM_DATE / transformout=(lead 1);
   convert SERVICE_FROM_DATE=lag_SERVICE_FROM_DATE / transformout=(lag 1);
run;
   
data want(keep=MEMBER_ID START_DT END_DT SERVICE_PROVIDER_ID);
   format MEMBER_ID START_DT END_DT SERVICE_PROVIDER_ID;
   set have_ll;
   by SERVICE_PROVIDER_ID;
   monthback=month(SERVICE_FROM_DATE)-month(lag_SERVICE_FROM_DATE);
   monthforward=month(lead_SERVICE_FROM_DATE)-month(SERVICE_FROM_DATE);

   if first.SERVICE_PROVIDER_ID then START_DT=SERVICE_FROM_DATE;
   else if (monthback=1 and monthforward>1) or last.SERVICE_PROVIDER_ID then do;
      END_DT=SERVICE_THROUGH_DATE;
      output;
      START_DT=lead_SERVICE_FROM_DATE;
   end;

   retain START_DT;format START_DT END_DT mmddyy10.;
run;

Re: How to flag continous month?

PeterClemmensen — Tue, 19 Dec 2017 21:41:56 GMT

@novinosrin "I am hungry".. gotta love it 😄

Re: How to flag continous month?

novinosrin — Tue, 19 Dec 2017 21:47:33 GMT

@PeterClemmensen Yep indeed loved it . I can't miss the amazing subway's sub of the day oven roasted chicken topping with mayonnaise and hot sauce lol

Re: How to flag continous month?

art297 — Tue, 19 Dec 2017 22:25:44 GMT

I think that the following meets your specifications:

data want (keep=MEMBER_ID START_DT END_DT SERVICE_PROVIDER_ID);
  set have;
  format START_DT END_DT mmddyy10.;
  by SERVICE_PROVIDER_ID;
  retain START_DT in_process;
  set have ( firstobs = 2 keep = SERVICE_FROM_DATE rename = (SERVICE_FROM_DATE = Next_Date) )
      have (      obs = 1 drop = _all_);
  if first.SERVICE_PROVIDER_ID or in_process eq 0 then do;
    in_process=1;
    START_DT=SERVICE_FROM_DATE;
  end;
  if last.SERVICE_PROVIDER_ID or intck('month',SERVICE_FROM_DATE,Next_Date) gt 1 then do;
    END_DT=SERVICE_THROUGH_DATE;
    output;
    in_process=0;
  end;
run;

Art, CEO, AnalystFinder.com

Re: How to flag continous month?

ChrisNZ — Tue, 19 Dec 2017 22:31:31 GMT

Like this?

data WANT;
  retain START_DT;
  set HAVE end=LASTOBS;
  PREV_ST   =lag(SERVICE_FROM_DATE);
  PREV_END  =lag(SERVICE_THROUGH_DATE);
  PREV_PROV =lag(SERVICE_PROVIDER_ID);
  if _N_=1 then START_DT=SERVICE_FROM_DATE;
  if _N_>1;
  if   (month(PREV_ST) + 1 ne month(SERVICE_FROM_DATE) )
    or (      PREV_PROV    ne   SERVICE_PROVIDER_ID    )
    or LASTOBS then do;
    END_DT     = ifn(LASTOBS, SERVICE_THROUGH_DATE,PREV_END);
    PROVIDER_ID= ifn(LASTOBS, SERVICE_PROVIDER_ID ,PREV_PROV);
    output; 
    START_DT   = SERVICE_FROM_DATE;
  end;
  format  	START_DT	END_DT	date9.;
  keep MEMBER_ID	START_DT	END_DT	PROVIDER_ID;
run;

MEMBER_ID	START_DT	END_DT	PROVIDER_ID
ABC	05JAN2017	08MAR2017	64058469
ABC	10JUL2017	21AUG2017	64058469
ABC	25MAR2017	22OCT2017	64089900

Re: How to flag continous month?

art297 — Tue, 19 Dec 2017 22:43:30 GMT

@ChrisNZ: Using lag or reading the next record (like I did) accomplish the same thing. However, since you didn't use the INTCK function, your code will fail if the visits go across years. e.g.:

data have;
  input MEMBER_ID $ SERVICE_FROM_DATE :mmddyy10. SERVICE_THROUGH_DATE :mmddyy10. SERVICE_PROVIDER_ID $;
  format SERVICE_FROM_DATE SERVICE_THROUGH_DATE mmddyy10.;
  datalines;
ABC 01/05/2017 01/05/2017 64058469
ABC 02/24/2017 02/24/2017 64058469
ABC 03/08/2017 03/08/2017 64058469
ABC 07/10/2017 07/10/2017 64058469
ABC 08/21/2017 08/21/2017 64058469
ABC 03/25/2017 03/25/2017 64089900
ABC 04/30/2017 04/30/2017 64089900
ABC 05/28/2017 05/28/2017 64089900
ABC 06/25/2017 06/25/2017 64089900
ABC 07/23/2017 07/23/2017 64089900
ABC 08/20/2017 08/20/2017 64089900
ABC 09/24/2017 09/24/2017 64089900
ABC 10/22/2017 10/22/2017 64089900
ABC 11/22/2017 11/22/2017 64089900
ABC 12/22/2017 12/22/2017 64089900
ABC 01/22/2018 01/22/2018 64089900
ABC 02/22/2018 02/22/2018 64089900
;

Art, CEO, AnalystFinder.com

Re: How to flag continous month?

ChrisNZ — Wed, 20 Dec 2017 04:39:00 GMT

True. I just wanted to supply a much shorter data step than the 2 above, which were the only 2 when I started replying..