SGPANEL Layout Comparison: Panel vs Lattice

This program illustrates the use of the SGPANEL procedure to visualize multidimensional data from the 'sashelp.heart' table. It first configures the graphical output environment (ODS). Then, it produces two distinct graphs: the first uses a panel layout ('layout=panel') and the second a lattice layout ('layout=lattice'). Both graphs superimpose a scatter plot and a quadratic regression curve.

Data Analysis

Type : SASHELP

Using the SASHELP.HEART example table. A filter is applied to keep only patients over 45 years old and exclude those who are 'Underweight'.

1 Code Block

CONFIGURATION

Explanation :
Initialization of macro variables for the path and resolution, and configuration of the ODS Listing destination for image export.

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1	%let gpath='.'; /--Put your Folder Name here--/
2	%let dpi=300;
3	ods html close;
4	ods listing gpath=&gpath image_dpi=&dpi;

2 Code Block

PROC SGPANEL

Explanation :
Generation of a panel graph (layout=panel) crossing the variables 'sex' and 'weight_status'. The graph shows the correlation between cholesterol and systolic pressure via a scatter plot and a 2nd degree polynomial regression.

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1	ods graphics / reset attrpriority=color width=4in height=3in imagename='2_2_1_Panel';
2	title 'Cholesterol by Systolic';
3	PROC SGPANEL DATA=sashelp.heart(where=(ageatstart > 45 and weight_status ne 'Underweight')) noautolegend;
4	panelby sex weight_status / layout=panel novarname headerattrs=(size=5);
5	scatter x=cholesterol y=systolic / markerattrs=graphdata1(symbol=circlefilled) transparency=0.7;
6	reg x=cholesterol y=systolic / degree=2 nomarkers;
7	RUN;
8	title;

3 Code Block

PROC SGPANEL

Explanation :
Generation of a graph similar to the previous one but using a lattice layout (layout=lattice) to align the panels in strict rows and columns.

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1	ods graphics / reset attrpriority=color width=4in height=3in imagename='2_2_2_Lattice';
2	title 'Cholesterol by Systolic';
3	PROC SGPANEL DATA=sashelp.heart(where=(ageatstart > 45 and weight_status ne 'Underweight')) noautolegend;
4	panelby sex weight_status / layout=lattice novarname;
5	scatter x=cholesterol y=systolic / markerattrs=(symbol=circlefilled) transparency=0.7;
6	reg x=cholesterol y=systolic / degree=2 nomarkers;
7	RUN;
8	title;

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