Sample 25605: Using partial spline interpolation with PROC G3GRID
The sample code on the Full Code tab uses a partial spline interpolation method in the GRID statement of PROC G3GRID, using eight nearest neighbors for computing the estimates of the first and second derivatives. The output data set generates a smoother surface plot than the surface plot that results from the default interpolation.
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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.
This sample code uses a partial spline interpolation method in the GRID statement of PROC G3GRID, using eight nearest neighbors for computing the estimates of the first and second derivatives. The output data set generates a smoother surface plot than the surface plot that results from the default interpolation.
/* 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;
/* Process points with PROC G3GRID */
proc g3grid data=nums out=partial;
grid y*x=z / partial
near=8
axis1=-5 to 5 by .5
axis2=-5 to 5 by .5;
run;
/* Define a title for the graph */
title1 'Surface Plot After Partial Interpolation';
/* Produce the graph */
proc g3d data=partial;
plot y*x=z;
run;
quit;
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.
This example specifies a partial spline interpolation method on the GRID statement, using eight nearest neighbors for computing the estimates of the first and second derivatives. The output data set generates a smoother surface plot than the surface plot that results from the default interpolation.
| Type: | Sample |
| Topic: | SAS Reference ==> Procedures ==> G3D
SAS Reference ==> Procedures ==> G3GRID
|
| Date Modified: | 2005-09-22 03:03:15 |
| Date Created: | 2005-05-23 14:18:30 |
Operating System and Release Information
| SAS System | SAS/GRAPH | z/OS | 9 TS M0 | |
| Microsoft® Windows® for 64-Bit Itanium-based Systems | 9 TS M0 | |
| Microsoft Windows Server 2003 Datacenter 64-bit Edition | 9 TS M0 | |
| OpenVMS Alpha | 9 TS M0 | |
| Tru64 UNIX | 9 TS M0 | |
| HP-UX IPF | 9 TS M0 | |
| Linux | 9 TS M0 | |
| Microsoft Windows Server 2003 Standard Edition | 9 TS M0 | |
| Microsoft Windows XP Professional | 9 TS M0 | |
| 64-bit Enabled AIX | 9 TS M0 | |
| 64-bit Enabled HP-UX | 9 TS M0 | |
| 64-bit Enabled Solaris | 9 TS M0 | |
| Microsoft Windows 2000 Server | 9 TS M0 | |
| Microsoft Windows 2000 Professional | 9 TS M0 | |
| Microsoft Windows NT Workstation | 9 TS M0 | |
| Microsoft Windows Server 2003 Datacenter Edition | 9 TS M0 | |
| Microsoft Windows Server 2003 Enterprise Edition | 9 TS M0 | |
| Microsoft Windows 2000 Datacenter Server | 9 TS M0 | |
| Microsoft Windows Server 2003 Enterprise 64-bit Edition | 9 TS M0 | |
| Microsoft Windows 2000 Advanced Server | 9 TS M0 | |
