This script demonstrates advanced use of the TEMPLATE procedure and GTL (Graph Template Language) to define a custom layout (lattice layout). It visualizes data from the SASHELP.HEART cardiac study by comparing characteristics based on sex and cause of death. The panel includes a scatter plot (Cholesterol vs. Systolic), a bar chart of mean weights, and box plots of diastolic pressure.
Data Analysis
Type : SASHELP
Data comes from the standard SASHELP.HEART table. A DATA step is used to recode some values of the 'deathcause' variable (CVD, CHD) for better graphical readability.
1 Code Block
INITIALIZATION
Explanation :
Configuration of the ODS (Output Delivery System) output environment, defining the output path and image resolution (DPI).
Configuration of the ODS (Output Delivery System) output environment, defining the output path and image resolution (DPI).
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| 1 | %let gpath='.'; /*--Put your Folder Name here--*/ |
| 2 | %let dpi=300; |
| 3 | odds listing style=listing image_dpi=&dpi gpath=&gpath; |
| 4 | odds html close; |
2 Code Block
PROC TEMPLATE
Explanation :
Definition of the graphic template 'Fig_7_0_Panel' using GTL. The 'lattice' layout divides the space into two columns (60%/40% weighting). The first column contains a scatterplot. The second column is subdivided into two rows containing a barchart and a boxplot.
Definition of the graphic template 'Fig_7_0_Panel' using GTL. The 'lattice' layout divides the space into two columns (60%/40% weighting). The first column contains a scatterplot. The second column is subdivided into two rows containing a barchart and a boxplot.
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| 1 | PROC TEMPLATE; |
| 2 | define statgraph Fig_7_0_Panel; |
| 3 | begingraph; |
| 4 | entrytitle "Characteristics of Subjects in the Study"; |
| 5 | layout lattice / columns=2 columnweights=(0.6 0.4) columngutter=10px; |
| 6 | sidebar / spacefill=false; |
| 7 | discretelegend 'a'; |
| 8 | endsidebar; |
| 9 | layout overlay; |
| 10 | scatterplot x=cholesterol y=systolic / group=sex name='a' |
| 11 | markerattrs=(symbol=circlefilled) datatransparency=0.5; |
| 12 | endlayout; |
| 13 | layout lattice / rows=2 columndatarange=union; |
| 14 | columnaxes; |
| 15 | columnaxis / discreteopts=(tickvaluefitpolicy=stagger) tickvalueattrs=(size=6); |
| 16 | endcolumnaxes; |
| 17 | layout overlay / yaxisopts=(labelattrs=(size=8) tickvalueattrs=(size=6) |
| 18 | label='Weight(mean)' offsetmin=0) |
| 19 | xaxisopts=(labelattrs=(size=8) tickvalueattrs=(size=6)); |
| 20 | barchart x=deathcause y=weight / group=sex groupdisplay=cluster stat=mean |
| 21 | baselineattrs=(thickness=0) fillattrs=(transparency=0.2) outlineattrs=(color=black); |
| 22 | endlayout; |
| 23 | layout overlay / yaxisopts=(labelattrs=(size=8) tickvalueattrs=(size=6)) |
| 24 | xaxisopts=(labelattrs=(size=8) tickvalueattrs=(size=6)); |
| 25 | boxplot y=diastolic x=deathcause / group=sex groupdisplay=cluster |
| 26 | fillattrs=(transparency=0.2) meanattrs=(size=5 color=black) outlineattrs=(color=black); |
| 27 | endlayout; |
| 28 | endlayout; |
| 29 | endlayout; |
| 30 | endgraph; |
| 31 | END; |
| 32 | RUN; |
3 Code Block
DATA STEP Data
Explanation :
Data preparation: reading SASHELP.HEART (with variable selection via KEEP) and recoding long character strings in the 'deathcause' variable to simplify display on the graph axes.
Data preparation: reading SASHELP.HEART (with variable selection via KEEP) and recoding long character strings in the 'deathcause' variable to simplify display on the graph axes.
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| 1 | DATA heart; |
| 2 | SET sashelp.heart(keep=Cholesterol Systolic Diastolic Deathcause Sex Weight); |
| 3 | IF deathcause="Cerebral Vascular Disease" THEN deathcause="CVD"; |
| 4 | ELSE IF deathcause="Coronary Heart Disease" THEN deathcause="CHD"; |
| 5 | ELSE deathcause=deathcause; |
| 6 | RUN; |
4 Code Block
PROC SGRENDER
Explanation :
Final graph generation. ODS Graphics is activated with specific dimensions, then PROC SGRENDER is called to apply the previously defined template ('Fig_7_0_Panel') to the prepared data ('heart').
Final graph generation. ODS Graphics is activated with specific dimensions, then PROC SGRENDER is called to apply the previously defined template ('Fig_7_0_Panel') to the prepared data ('heart').
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| 1 | ods listing; |
| 2 | ods graphics / reset width=6in height=2.4in imagename="7_0_Panel_V93"; |
| 3 | PROC SGRENDER DATA=heart template=Fig_7_0_Panel; |
| 4 | RUN; |
| 5 | |
| 6 | title; |
| 7 | footnote; |
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