Generating Stacked Area Plot with SGPLOT

This script illustrates the creation of a 'Stacked Area Plot' using the SGPLOT procedure. It first creates an internal dataset containing coordinates and calculated bases for stacking. Then, it configures the ODS output to generate an HTML file and a PNG image. The plot uses the BAND statement to draw the areas between the calculated variables.

Data Analysis

Type : INTERNAL_CREATION

Data is explicitly defined in the 'my_data' Data Step using the DATALINES statement.

1 Code Block

DATA STEP Data

Explanation :
Definition of the output name and creation of the 'my_data' dataset with calculation of 'base1', 'base2', and 'y2_stacked' variables required for graphically stacking the areas.

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1	%let name=area2;
2
3	filename odsout '.';
4
5	DATA my_data;
6	INPUT x y1 y2;
7	base1=0;
8	base2=y1;
9	y2_stacked=y2+y1;
10	DATALINES;
11	0 2.0 1.0
12	1 1.0 1.2
13	3 2.0 1.7
14	4 1.0 2.0
15	5 0.5 2.5
16	;
17	RUN;

2 Code Block

PROC SGPLOT

Explanation :
Configuration of ODS output (HTML and PNG), title definition, and execution of the SGPLOT procedure. The BAND statement is used twice to draw the stacked layers, and axes are customized.

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1	ODS LISTING CLOSE;
2	ODS HTML path=odsout body="&name..htm"
3	(title="SGplot Stacked Area Plot")
4	style=htmlblue;
5
6	ods graphics / imagefmt=png imagename="&name"
7	width=800px height=600px noborder;
8
9	title1 color=gray33 ls=0.0 h=23pt "Stacked Area Plot";
10
11	PROC SGPLOT DATA=my_data noautolegend;
12	styleattrs datacolors=(cx993366 cx9999ff);
13	band x=x lower=base1 upper=y1;
14	band x=x lower=base2 upper=y2_stacked;
15	yaxis
16	values=(0 to 4 BY 1) label='Y Axis'
17	labelattrs=(size=16pt weight=bold color=gray33)
18	valueattrs=(size=16pt weight=bold color=gray33)
19	offsetmin=0 offsetmax=0 grid;
20	xaxis
21	values=(0 to 5 BY 1) label='X Axis'
22	labelattrs=(size=16pt weight=bold color=gray33)
23	valueattrs=(size=16pt weight=bold color=gray33)
24	offsetmin=0 offsetmax=0 grid;
25	RUN;
26
27	QUIT;
28	ODS HTML CLOSE;
29	ODS LISTING;

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