PROC ANOM: Output Data Sets

The ANOM Procedure

Output Data Sets

OUTLIMITS= Data Set

The OUTLIMITS= data set saves decision limits and decision limit parameters. The following variables can be saved:

Table 4.23 OUTLIMITS= Data Set
Variable	Description
_ALPHA_	significance level ( $\text{[math]}$ ).
_DFE_	degrees of freedom for mean square error ( $\text{[math]}$ ).
_GROUP_	group-variable specified in the XCHART statement
_INDEX_	optional identifier for the decision limits specified with the OUTINDEX= option
_LDLX_	lower decision limit for group means
_LIMITK_	number of groups
_LIMITN_	group sample size associated with the decision limits
_MEAN_	weighted average of group means ( $\text{[math]}$ )
_MSE_	mean square error ( $\text{[math]}$ ).
_TYPE_	type (estimate or standard value) of _MEAN_ and _MSE_
_UDLX_	upper decision limit for group means
_VAR_	response specified in the XCHART statement

Notes:

In the unbalanced case, the special missing value V is assigned to the variables _LIMITN_, _LDLX_, and _UDLX_ to indicate that the decision limits vary with the group sample size.
Optional BY variables are saved in the OUTLIMITS= data set.

The OUTLIMITS= data set contains one observation for each response specified in the XCHART statement. For an example, see the section Saving Decision Limits.

OUTSUMMARY= Data Set

The OUTSUMMARY= data set saves group summary statistics. The following variables can be saved:

the group-variable
a group mean variable named by response suffixed with X
a group sample size variable named by response suffixed with N
a group standard deviation variable named by response suffixed with S

Given a response name that contains 32 characters, the procedure first shortens the name to its first 16 characters and its last 15 characters, and then it adds the suffix.

Group summary variables are created for each response specified in the XCHART statement. For example, consider the following statements:

proc anom data=Steel;
   xchart (Width Diameter)*Lot / outsummary=Summary;
run;

The data set Summary contains variables named Lot, WidthX, WidthS, WidthN, DiameterX, DiameterS, and DiameterN. Additionally, the following variables, if specified, are included:

BY variables
block-variables
symbol-variable
ID variables
_PHASE_ (if the OUTPHASE= option is specified)

For an example of an OUTSUMMARY= data set, see the section Saving Summary Statistics for Groups.

OUTTABLE= Data Set

The OUTTABLE= data set saves group summary statistics, decision limits, and related information. The following variables can be saved:

Variable	Description
_ALPHA_	significance level ( $\text{[math]}$ )
_EXLIM_	decision limit exceeded (if any)
group	values of the group variable
_LDLX_	lower decision limit for group mean
_LIMITN_	nominal sample size associated with the decision limits
_MEAN_	central line
_SUBN_	group sample size
_SUBX_	group mean
_UDLX_	upper decision limit for group mean
_VAR_	response specified in the XCHART statement

In addition, the following variables, if specified, are included:

BY variables
block-variables
symbol-variable
ID variables
_PHASE_ (if the READPHASES= option is specified)

Note:The variable _EXLIM_ is a character variable of length 8. The variable _PHASE_ is a character variable of length 48. The variable _VAR_ is a character variable whose length is no greater than 32. All other variables are numeric.

For an example, see the section Saving Decision Limits.

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