SAS/GRAPH Statements

Example 3. Rotating Plot Symbols Through the Color List

Features:

GOPTIONS statement options:

COLORS=

LEGEND statement options:

LABEL=

SYMBOL statement options:

VALUE=

TITLE statement option:

	JUSTIFY=
	HEIGHT=

Sample library member: GSYRPSC1

[output from gsyrpsc1.sas]

This example specifies a plot symbol on a SYMBOL statement and rotates the symbol through the specified color list. Temperature values in the data are represented by the same plot symbol in a different color. The example also shows how default symbol sequencing provides a default plot symbol if a plot needs more plot symbols than are defined.

It also uses a LEGEND statement to specify a two-line legend label, and to align the label with the legend values.

Set the graphics environment. The COLORS= option specifies the color list. This list is used by the SYMBOL statement.

goptions reset=all  border
         colors=(black blue green red)
          ;

Create the data set. BACTERIA contains information about the number and size of bacterial divisions at various temperatures.

data bacteria;
   input temp div mass life @@;
   datalines;
10 3 10 1  20 22 46 0  30 23 20 9   40 42 16 16  50 33 20 6
10 1 11 2  20 01 44 2  30 21 31 10  40 41 14 12  50 31 21 7
10 4 14 3  20 13 32 4  30 24 34 9   40 43 22 14  50 34 24 2
10 2 09 2  20 12 40 6  30 26 29 8   40 42 20 16  50 26 29 4
10 3 08 3  20 09 33 8  30 24 38 11  40 39 23 18  50 34 38 2
10 2 09 1  20 08 38 1  30 25 47 14  40 38 18 12  50 43 44 1
10 4 10 3  20 15 42 3  30 29 30 14  40 35 22 14  50 39 20 8
10 3 11 2  20 20 36 5  30 28 31 9   40 40 26 15  50 28 31 0
10 2 15 3  20 19 35 7  30 26 25 11  40 39 25 17  50 26 15 4
10 4 12 3  20 14 33 2  30 27 22 8   40 36 23 12  50 27 22 3
10 4 13 3  20 12 37 4  30 26 33 9   40 42 27 14  50 26 33 5
10 2 17 1  20 10 39 6  30 25 43 13  40 40 29 16  50 35 43 7
10 3 14 1  20 08 38 4  30 28 34 8   40 38 28 14  50 28 34 4
10 1 12 1  20 06 41 2  30 26 32 14  40 36 21 12  50 21 22 2
10 1 11 4  20 09 32 2  30 27 31 8   40 39 22 12  50 37 31 2
10 1 20 2  20 11 32 5  30 25 32 16  40 41 22 15  50 35 22 5
10 4 09 2  20 13 39 1  30 28 29 12  40 43 19 15  50 28 29 1
10 3 02 2  20 09 32 5  30 26 32 9   40 39 22 15  50 36 22 5
10 2 05 3  20 07 35 4  30 24 35 15  40 37 25 14  50 24 35 4
10 3 08 1  20 05 38 6  30 23 28 9   40 35 28 16  50 33 28 6
;
proc sort data=bacteria;
   by temp;
run;

Define title and footnote.J= breaks the title into two lines. H= specifies the size of the title.

title1 "Effect of Temperature on the Number"
       j=c  h=2 "and Size of Bacterial Divisions";
footnote1  j=r "GSYRPSC1";

Define symbol shape. The VALUE= option specifies a dot for the plot symbol. Because no color is specified, the symbol is rotated through the color list. Because the plot needs a fifth symbol, the default plus sign is rotated into the color list to provide that symbol.

symbol1  value=dot;

Define axis characteristics.

axis1 label=("Size (in Angstroms)") ;
axis2 label=("Divisions");

Define legend characteristics. The LABEL= option specifies text for the legend label. J=L specifies a new line and left-justifies the second string under the first. The POSITION= option aligns the top label line with the first (and in this case only) value row.

legend1 label=(position=(top left)
               "Temperature" j=l "(Celsius)")
        ;

Generate the plot.

proc gplot data= bacteria;
     plot div*mass=temp / haxis=axis1
                          vaxis=axis2
                          legend=legend1;
run;
quit;

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