SPSS® 12.0 Command Syntax Reference

748 IGRAPH
• Y assigns sales96 to the dependent axis, defining it to be continuous.
• X1 assigns sales95 to the X1 axis, defining it to be a scale variable (continuous).
• X2 assigns region to the X2 axis, defining it to be categorical.
• X1LENGTH, YLENGTH, and X2LENGTH define the length of each axis in inches.
COLOR, STYLE, and SIZE Subcommands
COLOR, STYLE, and SIZE specify variables used to create a legend. Each value of these variables
corresponds to a unique property of the chart. The effect of these variables depends on
the type of chart.
• Most charts use color in a similar fashion; casewise elements draw each case representation
using the color value for the case, and summary elements draw each group representation
in the color that represents a summarized value in the color data dimension.
• For dot-line charts, dot charts, and scatterplots, symbol shape is used for style variables
and symbol size is used for size variables.
• For line charts and lines in a scatterplot, dash patterns encode style variables and line
thickness encodes size variables.
• For bar charts, pie charts, boxplots, histograms, and error bars, fill pattern encodes style
variables. Typically, these charts are not sensitive to size variables.
CATEGORICAL legend variables split the elements in the chart into categories. A categorical
legend shows the reader which color, style, or size is associated with which category of the
variable. The colors, styles, or sizes are assigned according to the discrete categories of the
variable.
SCALE legend variables apply color or size to the elements by the value or a summary
value of the legend variable, creating a continuum across the values. COLOR and SIZE can
create either scale legends or categorical legends. STYLE can create categorical legends only.
Scale variables have the following keywords:
MIN Defines the minimum value of the scale.
MAX Defines the maximum value of the scale.
• The keywords MIN and MAX and their assigned values must be enclosed in parentheses.
In addition, the following keywords are available for COLOR, STYLE, and SIZE:
LEGEND Determines if the legend is displayed or not. The legend explains how to
decode color, size, or style in a chart.
TITLE Specifies a string used to title the legend.
The following keywords are available for COLOR and STYLE:
CLUSTER Creates clustered charts based on color or size variables.
STACK Creates stacked charts based on color or size variables.
CLUSTER and STACK are mutually exclusive. Only one can be specified.