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Date:         Tue, 7 Dec 2004 15:41:35 -0500
Reply-To:     "Chakravarthy, Venky" <Venky.Chakravarthy@PFIZER.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         "Chakravarthy, Venky" <Venky.Chakravarthy@PFIZER.COM>
Subject:      Re: Simple data querying problem
Comments: To: Zach Peery <zpeery@NATURE.BERKELEY.EDU>
Content-Type: text/plain; charset="iso-8859-1"

Does this mean that you do not have an issue with crossing day boundaries? If that is the case a key indexed approach should work well too.

data A ; input time time. ; cards ; 9.00 13.00 14.00 21.00 run ;

data b ; input time time. ; cards ; 9.25 13.50 23.00 run ;

data c ; array t (86400) _temporary_ ; do until (eof1) ; set b end = eof1; t(time) = 1 ; end ; do until (eof2) ; set a end = eof2 ; done = 0 ; do i = time to (time-3600) by -1 until (done) ; if t(i) then done = 1 ; end ; if not done then do i = time+1 to time+3600 until (done) ; if t(i) then done = 1 ; end ; if done then output ; end ; format time time. ; run ;

Venky Chakravarthy

-----Original Message----- From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU]On Behalf Of Zach Peery Sent: Tuesday, December 07, 2004 1:44 PM To: SAS-L@LISTSERV.UGA.EDU Subject: Simple data querying problem

Hi All,

Sorry about the last post - it seemed to want to send itself. in the meanwhile - I thought of a better way to explain the problem...

I am trying to identify observations in dataset A that occured within 1 hour of any observation in dataset B, and place these observations in a new dataset. Note that time is in hh.hh format such that 13.50 = 1:30 pm.

DATASET A time 9.00 13.00 14.00 21.00

DATASET B time 9.25 13.50 23.00

DESIRED DATASET time1 9.00 13.00 14.00

Thanks, I really appreciate any help that the list can provide. Zach

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