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/***************************************************************/
/* This program uses PROC FREQ and the ANNOTATE facilty to     */
/* create a scatter plot with varying sized symbols based      */
/* on the frequency of the observations.  You could also       */
/* vary the size, color, and shape of the symbols based on the */
/* frequency or some other variable.                           */
/***************************************************************/

goptions reset=all cback=white border;

data a;
  input xvar yvar;
  datalines;
1 1
2 3
2 3
2 3
3 5
3 5
4 2
4 2
4 2
4 2
4 2
5 7
5 7
5 7
5 7
5 7
5 7
;

proc freq data=a noprint;
  tables xvar*yvar / out=freqdata;
run;

data anno;
  retain xsys ysys '2' hsys '3' when 'a' color 'blue' text 'dot' function 'symbol';
  set freqdata;
  x=xvar; y=yvar;
  size=count;
run;

symbol i=none v=none c=white r=10;
title1 h=1.25 'Frequency';
axis1 minor=none;
axis2 minor=none;

proc gplot data=a;
  plot yvar * xvar / anno=anno vaxis=axis1 haxis=axis2;
run;
quit;

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