This sample illustrates how to use PROC SGPLOT to produce an overlaid fit plot for two groups, Female and Male, following a PROC LOESS fit. We illustrate the technique for a binary response (Y1) and also for a continuous response (Y2).

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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.

This sample illustrate how to use PROC SGPLOT to produce an overlaid fit plot for two groups, Female and Male, following a PROC LOESS fit. We illustrate the technique for a binary response (Y1) and also for a continuous response (Y2).

Please note that SAS/STAT® and SAS/GRAPH® are required in order to run this sample program.

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data a(drop=i seed);
   seed = 123456789; 
   do i = 1 to 50;
      x = ranuni(seed);
      gender = 'female';
      y1 = int(2*ranuni(seed));
      y2 = 2*x + abs((2*rannor(seed)));
      output;
      x = ranuni(seed);
      gender = 'male';
      y1 = int(2*ranuni(seed));
      y2 = 5*x + abs((2*rannor(seed)));
      output;
   end;
run;

proc sort data=a;
   by gender x;
run;

ods listing close;

proc loess data=a;
   by gender;
   model y1 y2 = x / clm;
   score / clm;
   ods output ScoreResults=SR;
   title1 "LOESS fit for two groups using BY stmt";
   title2 "two responses are modeled for illustration:";
   title3 "y1 - binary response    ";
   title4 "y2 - continuous response";
run;

ods html image_dpi=100 file='loessfit.html' path='.' style=listing;
ods graphics / reset noborder width=600px height=400px;

title1 "LOESS Fit Plot";
proc sgplot data=SR;  
   scatter x=x y=y1 / group=gender;
   series x=x y=p_y1 / group=gender;
   band x=x lower=lcl_y1 upper=ucl_y1 / group=gender transparency=0.75;
   title2 "Binary Response (Y1) - Transparency=0.75";
run;

proc sgplot data=SR;  
   scatter x=x y=y2 / group=gender;
   series x=x y=p_y2 / group=gender;
   band x=x lower=lcl_y2 upper=ucl_y2 / group=gender transparency=0.5;
   title2 "Continuous Response (Y2) - Transparency=0.5";
run;

ods html close;
ods listing;

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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.

This sample illustrates how to create a Loess fit plot with the SGPLOT procedure.

Type:	Sample
Topic:	SAS Reference ==> Procedures ==> SGPLOT

Date Modified:	2011-10-17 14:15:53
Date Created:	2011-08-04 12:03:02

Operating System and Release Information

Product Family	Product	Host	SAS Release
			Starting	Ending
SAS System	SAS/GRAPH	z/OS	9.2 TS1M0
		Microsoft® Windows® for 64-Bit Itanium-based Systems	9.2 TS1M0
		Microsoft Windows Server 2003 Datacenter 64-bit Edition	9.2 TS1M0
		Microsoft Windows Server 2003 Enterprise 64-bit Edition	9.2 TS1M0
		Microsoft Windows XP 64-bit Edition	9.2 TS1M0
		Microsoft® Windows® for x64	9.2 TS1M0
		Microsoft Windows Server 2003 Datacenter Edition	9.2 TS1M0
		Microsoft Windows Server 2003 Enterprise Edition	9.2 TS1M0
		Microsoft Windows Server 2003 Standard Edition	9.2 TS1M0
		Microsoft Windows XP Professional	9.2 TS1M0
		Windows Vista	9.2 TS1M0
		Windows Vista for x64	9.2 TS1M0
		64-bit Enabled AIX	9.2 TS1M0
		64-bit Enabled HP-UX	9.2 TS1M0
		64-bit Enabled Solaris	9.2 TS1M0
		HP-UX IPF	9.2 TS1M0
		Linux	9.2 TS1M0
		Linux for x64	9.2 TS1M0
		OpenVMS on HP Integrity	9.2 TS1M0
		Solaris for x64	9.2 TS1M0