SAS/GRAPH(R) 9.2: ODS Graphics Editor User's Guide
Understanding Annotation Concepts
This system is based
on the data in the plot area, which is the region within the axes.
The range of data of a data set variable plotted along an axis forms
the data range for that axis. Suppose that the variable “Height”
has observations between 55 and 75 and is plotted along the X axis.
The data range along the width of the plot area is about 55 to 75.
An annotation object drawn in the middle of the plot area has an X
coordinate of about 65.
Annotation
objects can be attached to a graph data point, depending on which
coordinate system the annotation uses. If the graph is resized, the
annotations move with the data point.
When an
annotation object (except an image) is first created, its default
coordinate system and value are determined based on its initial location
as follows:
Location Determines the Default Coordinate System
|
Location
|
Coordinate System and
Behaviors
|
|---|---|
|
Created in the plot area
|
By default, the data coordinate
system is used for all annotations except images. The coordinate value
is based on the relative location of the annotation with other data
observations in the plot.
If the plot area of the graph changes
due to the addition or removal of titles, footnotes, and so on, the
annotation moves along with the data observations. The annotation
location is synchronized with the data.
Lines are attached to
data individually at each end. When you draw a new line, one end might
exist in the plot area and the other end might exist outside the plot
area. The end that resides in the plot area attaches to a data point.
If the graph is resized, the attached end stays with the data point.
Three dimensional plots,
such as a surface plot, do not support the data coordinate system.
These plots always use the percent coordinate system.
You can move objects
from the data system to the percent system, and you can make an object
visible outside the plot area. For details, see Change the Data Attachment Properties of an Annotation.
|
|
Created outside plot area
|
By default, the percent coordinate
system is used. The coordinate value for the annotation object is
based on the location of the annotation with respect to the full size
of the graph, in percentage values.
|