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Programming Help!

To: s-news@lists.biostat.wustl.edu
Subject: Programming Help!
From: "Talukder, Enayet" <enayet_talukder@groton.pfizer.com>
Date: Fri, 18 Apr 2003 22:20:58 -0400
Dear S-Plus users:

I have three variables :

Y1     Y2     dummy
1.2     1.0      1
1.4     1.5      0
1.5     0.9      1
1.7     1.9      1
1.9     1.7      0

I like to replace  those elements of Y1 by the elements of Y2 for which
dummy=0 if these elements of Y1 are smaller than the corresponding elements
of Y2.
That is, I like to have the resultant new Y1 as

Y1
1.2
1.5
1.5
1.7
1.9

Please notice that the second element of new Y1 is not 1.4 any more but
replaced by the second element of Y2 [dummy==0]. However, the last element
of Y1 is not replaced by the corresponding element of Y2 even though
corresponding dummy=0 as 1.9> 1.7.

How can I accomplish this? I am using S+ 2000.

Any help will be appreciated.

Regards,
Enayet 



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