Date:         Fri, 18 Apr 2008 13:30:33 -0400
Reply-To:     Sigurd Hermansen <HERMANS1@WESTAT.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Sigurd Hermansen <HERMANS1@WESTAT.COM>
Subject:      Re: anybody can help with this function?
Comments: To: AnoniDeer <irain168@gmail.com>
In-Reply-To:  <48ee5c4b-67ee-4097-86cb-6426379560d9@24g2000hsh.googlegroups.com>
Content-Type: text/plain; charset="us-ascii"

Perhaps a simple example would help:

data test;
  do i=1 to 100;
   if ranuni(12371)>0.5 then y=1;
                        else y=0;
   /* Only for purpose of showing random value and that same seed
generates same series. */
   x=ranuni(12371);
   put i= x= y= ;
   output;
  end;
run;

The variable y should have about a value of 1 in about 50% of the rows
of test.  Nonetheless, each subsequent value of y in test has a ~50%
chance of having a value or 0 instead of 1.
S
-----Original Message-----
From: owner-sas-l@listserv.uga.edu [mailto:owner-sas-l@listserv.uga.edu]
On Behalf Of AnoniDeer
Sent: Friday, April 18, 2008 12:05 PM
To: sas-l@uga.edu
Subject: anybody can help with this function?


Hi,

I am so confused with the function ranuni(), anybody can help?

Thanks