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SAS Code Fragment: Making an Animated Spin Plot in SAS

* make data with predicted values ;
data test;
  * range age from -21 to 21 (centered) ;
  do age = -21 to 21 ;
    * range tenure from -18 to 25 (centered) ;
    do ten = -18 to 25 ;
	  * here is the regression equation ;
      ypred = 47 + 0.0705*age + 0.1820*ten - 0.00779*age*ten ;
      output ;
    end;
  end;
run;

* this is required ;
%macro ENDGIF;
   goptions gepilog='3B'x;
%mend;


%macro IMGSIZE(w=1280, h=1024, dpi=100, rows=43, cols=83);

   %if &dpi<=0 %then
      %put DPI must be greater than zero.;
   %else %do;
      goptions hsize=%sysevalf(&w/&dpi)in vsize=%sysevalf(&h/&dpi)in
               hpos=&cols                 vpos=&rows;
   %end;

%mend IMGSIZE;

%macro ANIMATE;
  %let first=1;
  * shift 6 degrees each frame ;
  %do angle=1 %to 360 %by 6;
      * on first frame, set defaults etc... ;
      %if &first = 1 %then %do;
         goptions reset=all;
		 * name of output gif file;
         filename out "e:\temp\spin.gif";


		 * initiialize size of .gif file ;
         %IMGSIZE(w=570, h=480);

         * set options for gif, like color font ;
         * wait time between frames ;
         goptions dev=gifanim gsfname=out
                  gsfmode=replace ftext=swiss
                  htext=1 gcopies=0 gwait=50  /* changed 25 to 5 */
                  cback=black
                  colors=(WHITE YELLOW GOLD BLUE MAGENTA DAGRAY BROWN);
         * give info for footnote ;
         footnote h=4 j=right "Graph of Age and Tenure on Predicted Y";
         %let first=0;
         %end;
      %else 
      %do;
         goptions gsfmode=append;
      %end;

	  * after last frame, put out final part via "endgif" macro ;
      %if &angle = 360 %then 
      %do;
         %ENDGIF;
      %end;

	  * this makes each frame ;
      proc g3d;
         plot age*ten=ypred/rotate=&ANGLE ctop=yellow cbottom=gold;
         label age    = 'Age of Person'
               ten    = 'Tenure of Person'
               ypred  = 'Predicted Y' ;
       run;
   %end;

%mend;

* this calls the animate macro to make the animated gif ;
%ANIMATE;

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