The SPECHART statement produces a control chart of the squared prediction error (SPE) statistics based on a principal component model that the MVPMODEL procedure computes. In a Phase I analysis, the SPE statistics are computed by PROC MVPMODEL and read from the HISTORY= data set. In a Phase II analysis, the SPE statistics are computed by the MVPMONITOR procedure from information about the principal component model that is specified in the LOADINGS= data set.
Table 13.2 summarizes the options available in the SPECHART statement. For detailed descriptions, see the section Common Chart Statement Options.
Table 13.2: SPECHART Statement Options
| 
                            Option  | 
                               
                             
                               
                        
                            Description  | 
                               
                             
                             
                     
|---|---|
| 
                            Specifies the probability used to compute SPE chart limits  | 
                             
                             
                     |
| 
                            Creates contribution plots for points outside control limits  | 
                             
                             
                     |
| 
                            Specifies that an SPE chart be displayed only if there are points lying outside control limits  | 
                             
                             
                     |
| 
                            Specifies the time interval between consecutive positions on an SPE chart  | 
                             
                             
                     |
| 
                            Suppresses creation of an SPE chart  | 
                             
                             
                     |
| 
                            Suppresses the horizontal axis label of an SPE chart  | 
                             
                             
                     |
| 
                            Suppresses the vertical axis label of an SPE chart  | 
                             
                             
                     |
| 
                            Specifies the number of horizontal axis plotting positions per panel  | 
                             
                             
                     |
| 
                            Adds a footnote to an SPE chart  | 
                             
                             
                     |
| 
                            Adds a secondary footnote to an SPE chart  | 
                             
                             
                     |
| 
                            Specifies a title for an SPE chart  | 
                             
                             
                     |
| 
                            Specifies a secondary title for an SPE chart  | 
                             
                             
                     |
| 
                            Creates a SAS data set that contains a summary of an SPE chart  | 
                             
                             
                     |
| 
                            Specifies that separate sequences of observations be plotted in a single SPE chart  | 
                             
                             
                     |
| 
                            Specifies SERIES variable values selecting sequences to be plotted  | 
                             
                             
                     |
| 
                            Specifies the number of panels used to display an SPE chart  |