G3D Procedure

Example 6: Generating a Scatter Plot with Modified Shapes and a Grid

Features:

SCATTER statement

SCATTER statement options:: COLOR=; GRID; NONEEDLE; SHAPE=; SIZE=

Other features:

DATA Step

This scatter plot modifies the results of measuring the petal length, petal width, and sepal length for the flowers of three species of irises. It uses a DATA step to add a color variable and a shape variable to the data set, shapes to distinguish iris species, and colors to distinguish iris species. It also removes needles from data points and adds a grid.

Program

goptions reset=all border;

title1 "Iris Species Classification";
title2 "Physical Measurement";
footnote1 j=r f="Albany AMT/it" "Source: Fisher (1936) Iris Data";

data iris;
   set sashelp.iris;
   length color shape $8.;
   if species="Setosa" then do; shape="club"; color="blue"; end; 
   if species="Versicolor" then do; shape="diamond"; color="red"; end;
   if species="Virginica" then do; shape="spade"; color="green"; end;
run;

proc g3d data=iris;
    scatter PetalLength*PetalWidth=SepalLength/
      color=color
      shape=shape
      size=1.5
      noneedle
      grid;
run;
quit;

Program Description

Set the graphics environment.

goptions reset=all border;

Define the titles and footnote.

title1 "Iris Species Classification";
title2 "Physical Measurement";
footnote1 j=r f="Albany AMT/it" "Source: Fisher (1936) Iris Data";

Add variables to original data set.

data iris;
   set sashelp.iris;
   length color shape $8.;
   if species="Setosa" then do; shape="club"; color="blue"; end; 
   if species="Versicolor" then do; shape="diamond"; color="red"; end;
   if species="Virginica" then do; shape="spade"; color="green"; end;
run;

Generate the surface plot.

proc g3d data=iris;
    scatter PetalLength*PetalWidth=SepalLength/
      color=color
      shape=shape
      size=1.5
      noneedle
      grid;
run;
quit;