Date:         Tue, 3 Feb 2004 20:57:33 -0500
Reply-To:     Don Stanley <don_stanley@PARADISE.NET.NZ>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Don Stanley <don_stanley@PARADISE.NET.NZ>
Subject:      Re: Conundrum using Set Point=

And also if you put the assignment inside a loop ...

  do i=1 to 1 ;
  P = rowmap[id];
  end ;
  put P=;

No problems ...

Don

On Tue, 3 Feb 2004 16:36:51 -0800, Choate, Paul@DDS <pchoate@DDS.CA.GOV>
wrote:

>Richard - Note that if you operate on the id variable the problem
>disappears:
>
>(V8.02 PC and MVS)
>
>either
>P = rowmap[id+0];
>or
>id=id;
>P = rowmap[id];
>
>and the problem stops.  The variable id is unstable for some reason.
Sounds
>like a question for Paul Dorfman.
>
>
>Paul Choate
>DDS Data Extraction
>(916) 654-2160
>
>-----Original Message-----
>From: Richard A. DeVenezia [mailto:radevenz@IX.NETCOM.COM]
>Sent: Tuesday, February 03, 2004 3:14 PM
>To: SAS-L@LISTSERV.UGA.EDU
>Subject: Conundrum using Set Point=
>
>I've a very strange situation happening in the following program.  The
third
>assignment to the point= variable is not 'sticking' and is thus causing a
>terrific headache.
>----------
>data ids;
>input id;
>rownum+1;
>cards;
>    5
>   10
>    6
>    1
>    2
>    7
>    1
>    3
>    7
>   11
>    8
>    5
>   10
>    4
>    4
>    8
>   11
>    2
>    3
>    9
>    9
>    6
>run;
>
>data weird;
>  array rowmap [11] _temporary_;
>  do while (not eoids);
>    set ids end=eoids;
>    if mod(rownum,2)=1 then
>      rowmap [id] = rownum;
>  end;
>
>  P = 1;
>  put P=;
>
>  set ids point=P;
>  rowmap [ id ] = -rowmap [ id ];
>  put rownum= id= rowmap[id]=;
>
>  P + 1;
>  put P=;
>
>  set ids point=P;
>  put rownum= id= rowmap[id]=;
>
>  P = rowmap[id];
>  put P=;
>
>  set ids point=P;
>  put rownum= id= rowmap[id]=;
>
>  stop;
>run;
>----------
>LOG
>----------
>P=1
>rownum=1 id=5 rowmap[5]=-1
>P=2
>rownum=2 id=10 rowmap[10]=13
>P=-1
>rownum=2 id=10 rowmap[10]=13
>eoids=1 id=10 rownum=2 P=-1 _ERROR_=1 _N_=1
>
>-----
>Focus on the 4th and 5th lines of the log:
>  rownum=2 id=10 rowmap[10]=13
>  P=-1
>Generated by code
>  put rownum= id= rowmap[id]=;
>  P = rowmap[id];
>  put P=;
>
>rowmap[10] is 13, and is assigned to P, which when put shows -1 !  ( -1 is
>value of rowmap[5] ! )
>
>
>Any clues to what is going on ?
>
>--
>Richard A. DeVenezia