SAS Macro Programs for Statistical Graphics: CORRESP

$Version: 1.9 (2 Nov 2001)
Michael Friendly
York University
This version of the CORRESP macro is now obsolete. See the CORRESP macro in Visualizing Categorical Data

CORRESP macro ( [download] get corresp.sas)

CORRESP performs correspondence analysis on a table of frequencies in a two-way (or higher-way) classification. The VAR= variables list specify one of the classification variables. The observations in the input data set form the other classification variable(s).

The coordinates of the row and column points are output to the data set specified by the OUT= parameter. The labels for the points are output to the data set specified by the ANNO= parameter. See "Section 10.3.2" for details about plotting the results and equating axes.

Parameters

DATA=_LAST_
Name of the input data set
VAR=
Column variables
ID=
ID variable: row labels
OUT=COORD
Output data set for coordinates
ANNO=LABEL
Name of the Annotate data set for row and column labels
ROWHT=1
Height (in character cells) for the row labels
COLHT=1
Height (in character cells) for the column labels

The OUT= data set

The results from the analysis are saved in the OUT= data set. This data set contains two character variables (_TYPE_ and _NAME_) which identify the observations and two numeric variables (DIM1 and DIM2) which give the locations of each point in two dimensions.

The value of the _TYPE_ variable is 'OBS' for the observations that contain the coordinates for the rows of the table, and is 'VAR' for the observations that contain the coordinates for the columns. The _NAME_ variable contains the value of ID= variable for the row observations and the variable name for the column observations in the output data set.