Explicitly defines one legend entry.
This entry will be rendered the next time that
proc legend is executed.
Usually, legends are built by successive plotting procs
having a legendlabel attribute. However, if additional
flexibility is needed to make custom legend entries, this
proc may be invoked, once per legend entry.
For example, if a scatterplot is being created with various sized
points, there is no automatic way to get a legend of the various
point sizes, so proc legendentry could be executed (probably several
times) to define legend information, then proc legend could be
executed to render it.
proc legendentry is also useful in setting up
which allow things like bar color, or scatterplot symbol color, size, or
shape to be controlled by a data field.
A gallery example that uses this proc is
The type of sample to be displayed with the entry.
t may be one of:
line, color, symbol, text, line+symbol, or text+symbol.
It may also be none, in order to insert spacing into the legend.
Example: sampletype: text
The label for the legend entry.
The \\n construct can be used to force a line break when the legend is displayed,
or the label can be wordwrapped using proc legend wraplen attribute.
Example 1: label: Eastern counties
Example 2: label: Response curve \\n for 30 mg dose
An optional short identifier to be associated with the entry,
so that the entry can be accessed later.
Used with proc bars colorfield, as in this example:
Details regarding the rendering of the sample.
Exactly what should be supplied for details, details2 and
perhaps details3 depends on the sampletype:
sampletype details details2 details3
---------- ------------ ------------- -----------
line linedetails - -
color color - -
symbol symboldetails - -
text a char or word textdetails -
line+symbol linedetails symboldetails -
text+symbol a char or word textdetails symboldetails
Explanations of types:
This is a technique where
the legend table mechanism serves to map certain data values to ploticus
or other appearance attributes.
For example, suppose field 3 of your data is a group code of either A, B, or C.
You could use legend-driven technique to render 'A' data rows in red, 'B' in blue, and 'C' in green.
Here's how you do it:
1. For every expected variation,
set up an explicit legend entry using proc legendentry.
label, tag, and details attributes should be supplied.
The tag will be compared with data field contents.
The details attributes control appearance.
2. Plot, using the appropriate attribute. For example, if you are
doing a bar graph where individual bar colors are controlled by a data
field, you would use proc bars and specify a colorfield.
Examples of legend-driven technique are