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st: RE: Excluding Observations


From   <J.Fischer@lse.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Excluding Observations
Date   Mon, 15 May 2006 22:40:45 +0100

Maybe I misunderstand, but what about 

drop if t == 1 & etime <=90

Or

 regr y x ..if   t == 1 & etime <=90

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Raphael
Fraser
Sent: 15 May 2006 22:34
To: statalist@hsphsun2.harvard.edu
Subject: st: Excluding Observations

I would like to exclude from my data set all observations up to 90 days
AFTER a transfusion (i.e. t = 1). The variable etime is the  time elapse
since last visit. Can any one help?

         id         dov   t   etime
     57   26apr1977   0      57
     57   27apr1977   0       1
     57   28jun1977   0      62
     57   27jul1977   0      29
     57   19aug1977   1      23
     57   12sep1977   0      24
     57   27sep1977   0      15
     57   30nov1977   0      64
     57   28feb1978   0      90
     57   22jan1990   0      55
     57   23jan1990   0       1
     57   22jun1990   0     150
     57   01aug1990   0      40
     57   06aug1990   0       5
     57   12sep1990   1      37
     57   19sep1990   0       7
     57   21sep1990   0       2
     57   28sep1990   0       7
     57   14nov1990   0      47
     57   28nov1990   0      14
     57   21jan1991   0      54
     57   29apr1991   0      98
     57   23aug1991   0     116
     57   29aug1991   0       6
     57   20sep1991   0      22
     57   30sep1991   0      10
     57   28nov1991   0      59
     57   20jan1992   0      53
     57   21jan2002   0      35
      57   27may2002   0     126
     57   31may2002   0       4
     57   07jun2002   0       7
     57   09jul2002   0      32
     57   09oct2002   0      92
     63   28dec1974   0       0
     63   29dec1974   0       1
     63   08jan1975   0      10
     63   15may1975   0     127
     63   30jun1975   0      46
     63   29dec1975   0     182
     63   12jan1976   0      14
     63   19jan1976   0       7
     63   30mar1976   0      71
     63   28jun1976   0      90
     63   22oct1976   0     116
     63   25oct1976   0       3
     63   24nov1976   1      30
     63   04dec1976   0      10
     63   06dec1976   0       2
     63   21dec1976   0      15
     63   21jan1977   0      31
     63   26jan1977   0       5
     63   18feb1977   0      23
     63   28mar1977   0      38
     63   31may1977   0      64
     63   13jun1977   0      13
     63   28jun1977   0      15
     63   31aug1977   0      64
     63   03sep1977   0       3
     63   06sep1977   0       3
     63   27sep1977   0      21
     63   07oct1977   0      10
     63   05nov1977   0      29
     63   08nov1977   0       3
     63   27nov1977   0      19
     63   07dec1977   0      10
     63   16dec1977   0       9
     63   18dec1977   0       2
     63   19dec1977   0       1
     63   10jan1978   0      22
     63   11jan1978   0       1
     63   12jan1978   0       1
     63   14feb1978   1      33
     63   22feb1978   0       8
     63   28feb1978   0       6
     63   17mar1978   0      17
     63   04apr1978   0      18
     63   07jun1978   0      64
     63   26jun1978   0      19
     63   14jul1978   0      18
     63   21jul1978   0       7
     63   09aug1978   0      19
     63   14aug1978   0       5
     63   11sep1978   0      28
     63   24sep1979   0      17
     63   27sep1979   0       3
     63   29sep1979   1       2
     63   14dec1979   0      76
     63   07jan1980   0      24
     63   21sep1982   0      46
     63   04oct1982   0      13
     63   17dec1982   0      74
     63   22dec1982   0       5
     63   25dec1982   0       3
     63   01jan1983   0       7
     63   04jan1983   0       3
     63   24jan1983   0      20
     63   15mar1983   0      50
     63   28jun1983   0     105
     63   28sep1983   0      92
     63   04oct1983   0       6
     63   09jan1984   0      97
     63   30jan1984   0      21
     63   28mar1984   0      58
     63   28jun1984   0      92
     63   01oct1984   0      95
     63   16oct1984   0      15
     63   20dec1984   0      65
     63   24dec1984   0       4
     63   03jan1985   0      10
     63   08jan1985   0       5
     63   27mar1985   0      78
     63   30apr1985   0      34
     63   01may1985   1       1
     63   13may1985   0      12
     63   14may1985   0       1
     63   11jun1985   0      28
     63   02jul1985   0      21
     63   19aug1985   0      48
     63   23sep1985   0      35
     63   01oct1985   0       8
     63   18oct1985   0      17
     63   24oct1985   0       6
     63   03dec1985   0      40

  Raphael

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