Date:         Thu, 20 May 2004 09:28:52 -0400
Reply-To:     "Beckman, Anthony" <Anthony_Beckman@URMC.ROCHESTER.EDU>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         "Beckman, Anthony" <Anthony_Beckman@URMC.ROCHESTER.EDU>
Subject:      Re: Choosing an episode
Content-Type: text/plain

I will try to clarify here:

What we are tying to look at is what a subjects brain activity is like just
prior and just after and "awakening" or a zero rating.

So.... I am envisioning (now as I am thinking on this) three new vars
(perhaps in a separate dataset?).
                1) Containing those readings from the pre-awake epoch
(#3,9,11,13)
                2) Containing the initial awake epoch (#4,10,12,14)
                3) Containing the post awake epoch (#5,11,13,15)

Then I would run a proc means and create and output dataset that contains
the average pre-wake,wake, post-wake readings by subject.  Which we could
compare by treatment condition to examine differences in response to wake.

I hope this helps, thank you all for your patience, it is appreciated.

Anthony


      epoch   rating    meter1  meter2 ....
        1       3               45              65
        2       3               46              66
        3       2               23              67
        4       0               56              56
        5       0               .               .
        6       0               .               .
        7       0               .               .
        8       2               .               .
        9       5               .               .
        10      0               .               .
        11      3               .               .
        12      0               .               .
        13      4               .               .
        14      0               .               .
        15      2               48              62

-You seem to want an interval to go from #3 to #5.  Are you then going to
-'lose'
-the zeroes at #5 and #6 and #7 ?-

-You want the next interval to go from #9 to #11 .  Okay, do we re-set
-instantaneously, so the next interval goes from #11 to #13, or do we
-lose
-that and start over at the next postivie-number-followed-by-zero
-sequence?
-If so, then why aren't we re-setting instantaneously within the #3 to #8
-sequence?  Perhaps the list simply hasn't been given the underlying
-systemata
-to clarify what you are really trying to achieve.-

-Could you write back to the list (not to me personally) and clarify, so
-that we might help you more?

-HTH,
-David
---
-David Cassell, CSC
-Cassell.David@epa.gov
-Senior computing specialist
-mathematical statistician