gensym |
Macro to generate SYMBOL statement for each GROUP |
gensym |
Visualizing Categorical Data: gensym
$Version: 1.2 (19 Jul 2001)
Michael Friendly
York University
Macro to generate SYMBOL statement for each GROUP
The GENSYM macro generates a series of SYMBOL statements for multiple group
plots of the form
proc gplot;
plot y * x = group;
Separate plot symbols, colors, line styles and interpolation options may be
generated for each group.
The GENSYM macro is called with keyword parameters. All parameters have
default values, but the N= parameter must usually be specified. The arguments may be listed within
parentheses in any order, separated by commas. For example:
%gensym(n=4);
The INTERP=, LINE=, SYMBOLS=, and COLORS= parameters are each lists of one or more values. If fewer than N (blank
delimited) values are given, the available values are reused cyclically as
needed.
- N=
-
The number of groups. N= symbol statements are constructed, named SYMBOL1, SYMBOL2, ..., SYMBOLN.
- H=
-
The height of the plotting symbol. The same H= value is used for all SYMBOL statements. [Default:
H=1.5
]
- INTERP=
-
List of one or more interpolation options. [Default:
INTERP=NONE
]
- LINE=
-
List of one or more numbers in the range 1..46 giving SAS/GRAPH line styles
[Default:
LINE=1
]
- SYMBOLS=
-
A list of one or more names of SAS/GRAPH plotting symbols. [Default:
SYMBOLS=%STR(SQUARE TRIANGLE : $ = X _ Y)
]
- COLORS=
-
A list of one or more names of SAS/GRAPH colors. [Default:
COLORS=BLACK RED GREEN BLUE BROWN YELLOW ORANGE PURPLE
]
To plot the four combinations of age group (old, young) and sex, with
separate plotting symbols (circle, dot) for old vs. young, and separate
colors (red, blue) for females vs. males, use the macro as follows:
proc gplot;
plot y * x = agesex;
%gensym(n=4, symbols=circle circle dot dot, colors=red blue,
interp=rl);
See also
gensymMacro to generate PATTERN statements
meanplot
scatmat
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