Date:         Sun, 15 Oct 2000 22:40:45 +0200
Reply-To:     Frank Poppe <Frank.Poppe@ZONNET.NL>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Frank Poppe <Frank.Poppe@ZONNET.NL>
Subject:      Re: GMAP use of user-defined formats

I see three reasons why you don't get the results you expect.

One: as Paula already suggested, you have to use the DISCRETE option on the
CHORO statement to prevent SAS from using it's own algorithm to define the
ranges.

Two: your format has gaps - it doesn't account for the ranges 21--24 and
31--34. These values retain their own places in the list of ranges, and use
the patterns you give.

Three: the example data you generate does produce a 0, so only 6 patterns
will be used.

Frank Poppe
PW Consulting
the Netherlands

Jennifer Gibson <jg2f@unix.mail.virginia.edu> schreef in berichtnieuws
8s7um7$gt6$1@murdoch.acc.Virginia.EDU...
> SAS-L,
>
> I'm new to GMAP, so maybe there is something obvious I'm missing.  I'm
> trying to shade counties based on frequency counts of patients per county.
> For reasons I don't understand, it doesn't seem to be respecting the
> user-defined format I'm trying to apply.  It disrespects the format in
> different ways depending on the exact data (I get something different, but
> wrong, with this example than I get with my actual data), so maybe there
is
> an more general concept I'm failing to grasp.  I've also tried using the
> levels= option on the choro statement, and that gives a whole other set of
> incorrect results.  I'm using v8.1 for Windows.
>
> Any suggestions, relevant documentation?
>
> Jennifer
>
> *EXAMPLE PROGRAM;
> data vamap;
>   set maps.uscounty;
>   if state = 51;
>   cfips=county;
> run;
>
> proc sort data=vamap out=tmpmap nodupkey; by cfips; run;
>
> data ptvol;
>   set tmpmap(keep=cfips);
>   count=round(ranuni(12)*100);
> run;
>
> proc format;
>   value vol
>     0='0'
>     1-5='1-5'
>     6-10='6-10'
>     11-15='11-15'
>     15-20='15-20'
>     25-30='25-30'
>     35-high='35+';
> run;
> /*Using this format, I would expect the legend to contain only these 7
> levels and
> the shading to use the seven patterns defined below for each of those
> levels*/
>
> pattern1 v=s c=grayFF;
> pattern2 v=s c=ligr;
> pattern3 v=s c=ygr;
> pattern4 v=m3n135 c=gray;
> pattern5 v=m3n45 c=gray;
> pattern6 v=s c=tan;
> pattern7 v=s c=brown;
>
> proc gmap data=ptvol map=vamap;
>   id cfips;
>   format count vol.;
>   choro count /cempty=black coutline=black;
> run; quit;
>
>