splot Schematic boxplots (printer version) splot

SAS Macro Programs: splot

$Version: 1.7 (7 Jun 2001)
Michael Friendly
York University

The splot macro ( [download] get splot.sas)

The splot macro draws side-by-side boxplots for the groups defined by one or more grouping (CLASS) variables in a data set. It is a simplified, printer version of the boxplot macro.

Method

The macro uses PROC UNIVARIATE; BY CLASS producing a printer-plot version of the boxplot, and discards all the output for each group separately.

To do this, the macro uses PROC PRINTTO to route the PROC UNIVARIATE output to a temporary file. This means that you should not call the splot macro within another application that uses PROC PRINTTO to redirect procedure output.

Usage

DATA=_LAST_
Name of the input data set.
CLASS=
Grouping variable(s). The CLASS= variables may be character or numeric. If no CLASS= variable is specified, the program generates one boxplot for all the data.
VAR=
The name of the response variable(s) to be plotted. A separate plot is produced for each variable listed.
ID=
A character variable to identify each observation. If an ID= variable is specified, outside variables are labelled on the graph, using the first 8 characters of the value of the ID variable (to reduce overplotting). Otherwise, outside points are not labelled.
LS=80
Linesize option for printed output, which determines how many groups will fit on the page.

Example

The example below plots data for 6 groups in a 2 x 3 design, classified by factors A and B. 
title h=1.5 'Notched Boxplot: 2 x 3 design';
%splot(data=testbox,
     class= A B, var=y,
     id=name,
	  ls=80);

See also

boxplot Box-and-whisker plots
dotplot Dotplots