Date:         Thu, 9 Dec 1999 11:53:05 GMT0BST
Reply-To:     Panos PAPANIKOLAOU <PapanikolaouP@CARDIFF.AC.UK>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Panos PAPANIKOLAOU <PapanikolaouP@CARDIFF.AC.UK>
Subject:      a random sample.

Dear All,

I would appreciate if i would receive your comments on the
following exercise that I should carry out.

  1.  there are two data-sets, say MAST1, MAST2 (both have the
 same number of variables).


  2. Randomly  select  50%  of each data-set.  That is, take
  randomly 50% of MAST1 and another 50% of MAST2.

 3. Output each of these randomly taken 50 from each data-set to
    two new data-sets, say EXP1 and EXP2. So, EXP1 will contain
   50% of MAST1 and 50% of MAST2.  EXP2 will have similar
 construction to EXP1.  That is, EXP2 will have the remaining 50%
 of randomly selected cases of data-sets MAST1 and MAST2.

 I would be grateful if I would have your advice on how to procced.
 The provision of any SAS codes would be very welcome and well
 appreciated.

 Thank you very much indeed for taking the time to consider my
 request.  I look forward to hearing from you.


  Yours sincerely
  Panos Papanikolaou
  UWCM
  Cardiff
  Great Britain