SCORECHART Statement :: SAS/QC(R) 13.1 User's Guide

SCORECHART Statement

SCORECHART < / options> ;

The SCORECHART statement produces univariate control charts of principal component scores. In a Phase I analysis, the scores are computed by PROC MVPMODEL and read from a HISTORY= data set. In a Phase II analysis, PROC MVPMONITOR computes the scores from process data contained in a DATA= data set and information about the principal component model that is specified in the LOADINGS= data set.

Table 13.1 summarizes the options available in the SCORECHART statement.

Table 13.1: SCORECHART Statement Options

Option	Description
COMP=	Specifies the principal components whose scores are plotted
EXCHART	Specifies that a score chart be displayed only if there are points lying outside the control limits
INTERVAL=	Specifies the time interval between consecutive positions on a score chart
NOCHART	Suppresses creation of score charts
NOHLABEL	Suppresses the horizontal axis label of a score chart
NOVLABEL	Suppresses the vertical axis label of a score chart
NPANELPOS=	Specifies the number of horizontal axis plotting positions per panel
ODSFOOTNOTE=	Adds a footnote to a score chart
ODSFOOTNOTE2=	Adds a secondary footnote to a score chart
ODSTITLE=	Specifies a title for a score chart
ODSTITLE2=	Specifies a secondary title for a score chart
OUTTABLE=	Creates a SAS data set that contains a summary of a score chart
OVERLAY=	Overlays separate series of observations or scores for multiple principal components in a single score chart
SERIESVALUE=	Specifies SERIES variable values that select sequences to be plotted
SIGMAS=	Specifies the multiples of a score’s standard deviation used to compute score chart limits
TOTPANELS=	Specifies the number of panels used to display a score chart

The following options are available only in the SCORECHART statement. For detailed descriptions of options common to the SCORECHART, SPECHART, and TSQUARECHART statements, see the section Common Chart Statement Options.

COMP=value-list | ALL

specifies the principal components whose scores are plotted. You can specify the following values:

value-list: plots the principal components whose numbers (1, 2, …) appear in value-list.
ALL: plots all the principal components whose scores are in the input data set.

If you do not specify this option, scores for only the first principal component are plotted.

OVERLAY=COMP | SERIES

requests that multiple sequences of principal component scores be overlaid on a single control chart. You can specify the following values:

COMP: overlays the scores for different principal components on the chart. The COMP= option determines which principal components are included.
SERIES: overlays sequences of scores defined by the SERIES variable and selected by the SERIESVALUE= option on the chart. This value is applicable only when a TIME variable is specified and the input data set contains multiple scores for each principal component that have the same time value.

The value you specify in this option determines the number of separate control charts that are produced. For example, if you select $p$ principal components and $n$ SERIESVALUE= values, PROC MVPMONITOR produces

$n$ charts if you specify OVERLAY=COMP,
$p$ charts if you specify OVERLAY=SERIES, and
$p \times n$ charts if you do not specify the OVERLAY= option.

SIGMAS=k

specifies the width of the control limits in terms of the multiple k of a score’s standard deviation. By default, k=3.

The MVPMONITOR Procedure

SCORECHART Statement