The G3D Procedure

Example 5: Using Shapes in Scatter Plots

Procedure features:

	COLOR=
	GRID
	NONEEDLE
	SHAPE=

Other features:

Data set:

Sample library member:

GR29N05

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This program modifies that shown in Generating a Simple Scatter Plot to use shape symbols and color to distinguish information for various iris species. It also uses NOTE statements to simulate a plot legend.

The program then generates a second plot to modify the first. As shown by the following output, the second plot request suppresses the needles that connect data points to the horizontal plane, and adds reference lines to make it easier to interpret data values. It also labels the plot axes with descriptive text.

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libname reflib 'SAS-data-library'; goptions reset=global gunit=pct border cback=white colors=(black blue green red) ftext=swiss ftitle=swissb htitle=6 htext=4;

data reflib.iris2; set reflib.iris; length species $12. colorval $8. shapeval $8.; if spec_no=1 then do; species='setosa'; shapeval='club'; colorval='blue'; end; if spec_no=2 then do; species='versicolor'; shapeval='diamond'; colorval='red'; end; if spec_no=3 then do; species='virginica'; shapeval='spade'; colorval='green'; end; run;

title1 'Iris Species Classification'; title2 'Physical Measurement'; title3 'Source: Fisher (1936) Iris Data'; footnote1 j=l ' Petallen: Petal Length in mm.' j=r 'Petalwid: Petal Width in mm. '; footnote2 j=l ' Sepallen: Sepal Length in mm.' j=r 'Sepal Width not shown '; footnote3 j=r 'GR29N05(a) ';

proc g3d data=reflib.iris2; scatter petallen*petalwid=sepallen / color=colorval shape=shapeval;

note; note j=r 'Species: ' c=green 'Virginica ' j=r c=red 'Versicolor ' j=r c=blue 'Setosa '; run;

title3; footnote1 j=l ' Source: Fisher (1936) Iris Data'; footnote2 j=r 'GR29N05(b) ';

proc g3d data=reflib.iris2; scatter petallen*petalwid=sepallen / noneedle grid color=colorval shape=shapeval;

label petallen='Petal Length' petalwid='Petal Width' sepallen='Sepal Length'; run; quit;

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