The MVPMONITOR Procedure

Output Data Sets

OUTHISTORY= Data Set

The OUTHISTORY= data set contains all the variables in the input data set plus new variables that contain the principal component scores, residuals, and other computed values listed in Table 13.10.

Table 13.10: Computed Variables in the OUTHISTORY= Data Set

Variable

Description

Prin1–Prinj

Principal component scores

R_$var1$–R_$varp$

Residuals

_NOBS_

Number of observations used in the analysis

_SPE_

Squared prediction error (SPE)

_TSQUARE_

$T^2$ statistic computed from principal component scores


The names of the score variables are formed by concatenating the value given by the PREFIX= option (or the default Prin, if PREFIX= is not specified) and the numbers 1, 2, …, j, where j is the number of principal components in the model.

The names of the residual variables are formed by concatenating the value given by the RPREFIX= option (or the default R_, if RPREFIX= is not specified) and the names of the process variables used in the analysis. Residual variables are created only when the number of principal components in the model is less than the number of process measurement variables in the input data set.

OUTTABLE= Data Set

You can save control chart statistics, control limits, and related information by specifying the OUTTABLE= option in a SCORECHART , SPECHART , or TSQUARECHART statement. Each chart statement produces OUTTABLE= data sets containing different variables. Table 13.11, Table 13.12, and Table 13.13 list the variables that are contained in the three types of OUTTABLE= data set.

Table 13.11: Score Chart OUTTABLE= Data Set Variables

Variable

Description

_COMP_

Principal component number

_EXLIM_

Flag to indicate control limit was exceeded

_LCL_

Lower control limit

_MEAN_

Center line

_SCORE_

Principal component score

series

SERIES variable, if specified

_SIGMAS_

Multiple of score standard deviation used to compute control limits

time

TIME variable, if specified

_UCL_

Upper control limit


Table 13.12: SPE Chart OUTTABLE= Data Set Variables

Variable

Description

_ALPHA_

Probability ($\alpha $) of exceeding control limits

_EXLIM_

Flag to indicate control limit was exceeded

_LCL_

Lower control limit

_MEDIAN_

Center line

_NCOMP_

Number of principal components in the model

residuals

Residual variables

series

SERIES variable, if specified

_SPE_

Squared prediction error (SPE) statistic

time

TIME variable, if specified

_UCL_

Upper control limit


Table 13.13: $T^2$ Chart OUTTABLE= Data Set Variables

Variable

Description

_ALPHA_

Probability ($\alpha $) of exceeding control limits

_EXLIM_

Flag to indicate control limit was exceeded

_LCL_

Lower control limit

_MEDIAN_

Center line

_NCOMP_

Number of principal components in the model

residuals

Residual variables

series

SERIES variable, if specified

time

TIME variable, if specified

_TSQUARE_

$T^2$ statistic

_UCL_

Upper control limit