G3D Procedure

Example 5: Generating a Scatter Plot with Modified Shapes

Features:

SCATTER statement

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

Other features:

NOTE statement

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, colors to distinguish iris species, and a NOTE statement to simulate a legend.

Program

goptions reset=all border;

title1 "Iris Species Classification";
title2 "Physical Measurement";
title3 "Source: Fisher (1936) Iris Data";
footnote1 j=l "Sepal Width not Shown";

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;
note j=r f="Albany AMT/bo" "Species:  " c=green "Virginica      "
         j=r    c=red "Versicolor      "
         j=r    c=blue "Setosa      ";
 scatter PetalLength*PetalWidth=SepalLength/
      color=color
      shape=shape
      size=1.5;
run;
quit;

Program Description

Set the graphics environment.

goptions reset=all border;

Define the titles and footnote.

title1 "Iris Species Classification";
title2 "Physical Measurement";
title3 "Source: Fisher (1936) Iris Data";
footnote1 j=l "Sepal Width not Shown";

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;
note j=r f="Albany AMT/bo" "Species:  " c=green "Virginica      "
         j=r    c=red "Versicolor      "
         j=r    c=blue "Setosa      ";
 scatter PetalLength*PetalWidth=SepalLength/
      color=color
      shape=shape
      size=1.5;
run;
quit;