Base SAS 9.1.3 Procedures Guide - Acsu Buffalo

58 Chapter 1. The CORR Procedure
The experimental PLOTS=SCATTER option requests scatter plots for all the variables
in the VAR statement, and the NMAXVAR=2 suboption restricts the number of
plots created to the first two variables in the VAR statement. The ELLIPSE=MEAN
and ALPHA= suboptions request 95% and 99% confidence ellipses for the mean.
Output 1.7.6.
Scatter Plot with Confidence Ellipses (Experimental)
The confidence ellipse for the mean is centered at the means (¯x, ȳ). For further
details, see the section “Confidence and Prediction Ellipses” on page 33.
Example 1.8. Computing Partial Correlations
A partial correlation measures the strength of the linear relationship between two
variables, while adjusting for the effect of other variables.
The following statements request a partial correlation analysis of variables Height
and Width while adjusting for the variables Length3 and Weight. The latter variables,
which are said to be “partialled out” of the analysis, are specified with the
PARTIAL statement.