The MVPDIAGNOSE Procedure

CONTRIBUTIONPLOT Statement

  • CONTRIBUTIONPLOT < / options>;

The CONTRIBUTIONPLOT statement produces a contribution plot for each observation in the input data set, up to a maximum that is specified by the MAXNPLOTS= option. Each contribution plot is displayed as a separate graph. You can use the CONTRIBUTIONPANEL statement to display multiple contribution plots in a paneled layout.

Table 11.2 summarizes the options available in the CONTRIBUTIONPLOT statement.

Table 11.2: CONTRIBUTIONPLOT Statement Options

Option

Description

MAXNPLOTS=

Specifies the maximum number of contribution plots displayed

MAXNVARS=

Specifies the maximum number of process variable contributions displayed in each plot

ODSFOOTNOTE=

Adds a footnote to the contribution plots

ODSFOOTNOTE2=

Adds a secondary footnote to the contribution plots

ODSTITLE=

Specifies a title for the contribution plots

ODSTITLE2=

Specifies a secondary title for the contribution plots

TYPE=

Specifies the type of contribution plots produced


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

MAXNPLOTS=n

specifies the maximum number of contribution plots to be produced by the CONTRIBUTIONPLOT statement. The number of plots that are produced is the minimum of n and the number of observations in the input data set. When n is less than the number of observations, contribution plots are produced for the first n observations. The default is 50.

MAXNVARS=n

specifies that only the n contributions that have the greatest magnitudes be displayed in each plot. The contributions are ranked independently for each plot, so different process variable contributions might be displayed in different plots. By default, all contributions are displayed.

TYPE=SPE | TSQUARE

specifies the type of contribution plot to be created. The option TYPE=TSQUARE specifies that the contribution plots be based on the $T^2$ statistics. The option TYPE=SPE specifies that the contribution plots be based on the SPE statistics. By default, TYPE=TSQUARE if a LOADINGS= data set is provided and TYPE=SPE otherwise. You can use more than one CONTRIBUTIONPLOT statement. You must specify a LOADINGS= data set to create $T^2$ contribution plots.