Basic Analysis and Graphing - SAS

Chapter 12 Creating Overlay Plots 341
The Overlay Plot
Table 12.1 Description of the Overlay Plot Launch Window
Cast Selected Columns Into Roles:
X, Y You can graph many numeric Y variables against a single X variable.
Left Scale/Right Scale
Grouping
By
The columns assigned to the Y role have a left- or right-pointing arrow to
the left of the column name. This arrow designates on which vertical axis
(on the left or right of the plot) the variable appears. Change the
designation by highlighting the column in the Y list and clicking the Left
Scale/Right Scale button.
This option produces a matrix of graphs for each Grouping variable.
This option produces a separate graph for each level of the By variable. If
two By variables are assigned, a separate graph for each possible
combination of the levels of both By variables is produced.
Options:
Sort X
X Log Scale
Left Y Log Scale
Right Y Log Scale
This option causes the points to be connected in order of ascending X
values. Otherwise, the points are connected in row order. This option is
selected by default.
This option applies a log scale to the x-axis.
This option applies a log scale to the left y-axis. It is available only if one
or more Y variables are left-scaled. (See Left Scale/Right Scale in this
table.)
This option applies a log scale to the right y-axis. It is available only if one
or more Y variables are right-scaled. (See Left Scale/Right Scale in this
table.)
For more information about the launch window, see Using JMP.
The Overlay Plot
Follow the instructions in “Example of an Overlay Plot” on page 339 to produce the plot shown in
Figure 12.5.
Initially, this platform overlays all specified Y columns. The legend below the plot shows individual markers
and colors that identify each Y column. For information about additional options for the plot, see “Overlay
Plot Options” on page 342.