Appearance of Grouped Data

The GROUP= column option is used to plot data when a classification or grouping variable is available. By default, this option automatically uses the style elements GraphData1 to GraphDataN for the presentation of each unique group value.

proc template;
  define statgraph group;
    begingraph;
      entrytitle "Tech Stocks 2002-2004";
      entryfootnote halign=left "Source: SASHELP.STOCKS";
      layout overlay;
        seriesplot x=date y=close / group=stock name="series"
          lineattrs=(thickness=2);
        discretelegend "series";
      endlayout;
    endgraph;
  end;
run;
 
proc sgrender data=sashelp.stocks template=group;
  where date between "1jan02"d and "31dec04"d;
run;

In general, you cannot specify the line or marker properties for specific group values directly from GTL, as you can for non-grouped data. Consider the following specification for a line attribute:

lineattrs=(thickness=2)

When this line option is used, the line thickness is set as a style override. However, this override applies equally to all group values. The same is true for overrides of color or line pattern. This means that you can set one or more fixed appearance attributes from GTL for all group values, but you cannot directly assign unique visual properties to an individual group value in GTL.