---

These sample files and code examples are provided by SAS Institute Inc. "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Recipients acknowledge and agree that SAS Institute shall not be liable for any damages whatsoever arising out of their use of this material. In addition, SAS Institute will provide no support for the materials contained herein.

The graphics output in the Results tab was produced using SAS® 9.2. Submitting the sample code with releases of SAS prior to SAS 9.2 might produce different results.

 /* Set the graphics environment */
goptions reset=all border cback=white htitle=12pt; 

 /* Create data set WORK.NUMS using  */
 /* a set of randomly sampled points */
data nums;
   keep x y z;
   do i=1 to 30;
      x=10*ranuni(33)-5;
      y=10*ranuni(35)-5;
      z=sin(sqrt(x*x+y*y));
      output;
   end;
run;

 /* Define a title for the graph */
title1 'Contour Plot after Default Interpolation';

 /* Process the original data with PROC G3GRID  */
proc g3grid data=nums out=numdef;
   grid y*x=z / axis1=-5 to 5 by .5
                axis2=-5 to 5 by .5;
run;

 /* Create the plot with the default interpolation */
proc gcontour data=numdef;
   plot y*x=z;
run;
quit; 

 /* Define a new title for the graph */
title1 'Contour Plot after Spline Interpolation';

 /* Process the original data with PROC G3GRID */
proc g3grid data=nums out=numspl;
   grid y*x=z / spline
                axis1=-5 to 5 by .5
                axis2=-5 to 5 by .5;
run;

 /* Create the contour graph with a spline interpolation */
proc gcontour data=numspl;
   plot y*x=z;
run;
quit;

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These sample files and code examples are provided by SAS Institute Inc. "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Recipients acknowledge and agree that SAS Institute shall not be liable for any damages whatsoever arising out of their use of this material. In addition, SAS Institute will provide no support for the materials contained herein.

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