SCOREMATRIX Statement :: SAS/QC(R) 12.1 User's Guide

SCOREMATRIX Statement

SCOREMATRIX < / options> ;

The SCOREMATRIX statement produces a matrix of score plots, each of which is a scatter plot of scores for a pair of principal components. You can use the SCOREPLOT statement to display a single score plot in a graph by itself.

Table 11.3 summarizes the options available in the SCOREMATRIX statement.

Table 11.3: SCOREMATRIX Statement Options

Option	Description
ALPHA=	Specifies the $\alpha$ value for prediction ellipses
ELLIPSE	Requests prediction ellipses to be overlaid on score plots
GROUP=	Specifies a variable for grouping points in score plots
LABELS=	Specifies whether points in the score plots are labeled
NCOMP=	Specifies the number of principal components whose scores are plotted
ODSFOOTNOTE=	Adds a footnote to the score matrix
ODSFOOTNOTE2=	Adds a secondary footnote to the score matrix
ODSTITLE=	Specifies a title for the score matrix
ODSTITLE2=	Specifies a secondary title for the score matrix

You can specify the following options in the SCOREMATRIX statement. The section Common Plot Statement Options describes additional options that are available in all plot statements.

ALPHA= $\alpha$: specifies the $\alpha$ value for prediction ellipses that are overlaid on the score plots. The probability that a new observation falls outside the ellipse is $\alpha$ . The default is 0.05. If you specify the ALPHA= option, you do not need to specify the ELLIPSE option.
ELLIPSE: requests that prediction ellipses be overlaid on the score plots. The probability that a new observation falls outside the ellipse is specified by the ALPHA= option.
GROUP=variable: specifies a variable in the input data set that is used to group the points in the score plots. Points that have different GROUP= values are plotted using different markers or colors (or both) to distinguish the groups.
LABELS=ON | OFF: specifies whether points in the score plots are labeled. Points are labeled with the values of the first variable listed in the ID statement, or the observation number if no ID statement is specified. The default is LABELS=OFF.
NCOMP=n: specifies the number of principal components whose scores are plotted in the matrix. The principal components that are plotted are always 1 through n. By default, the matrix contains score plots for all principal components.

The MVPDIAGNOSE Procedure

SCOREMATRIX Statement