The ANOM Procedure

Dictionary of ANOM Chart Statement Options

This section provides detailed descriptions of options that you can specify in the following chart statements:

  • BOXCHART

  • PCHART

  • UCHART

  • XCHART

Options that are common to the ANOM and SHEWHART procedures are listed in the "Summary of Options" subsection in the sections for each chart statement. They are described in detail in Dictionary of Options: SHEWHART Procedure

Options are specified after the slash (/) in a chart statement. For example, to place the label "Mean" on the center line of an ANOM chart, you can use the XSYMBOL= option as follows: 

proc anom data=Measures;
   xchart Length*Sample / xsymbol='Mean';
run;

The options described in this section are listed alphabetically. For tables of options organized by function, see the "Summary of Options" sections in the sections for the various chart statements. Unless indicated otherwise, the options listed here are available with every chart statement.

ALPHA=value

specifies the probability of a Type I error.

CINFILL=color | EMPTY | NONE

specifies the color for the area inside the decision limits. By default, this area filled with an appropriate color from the ODS style. You can specify the keyword EMPTY or NONE to leave the area between the decision limits unfilled. If you specify a color, it is ignored when ODS Graphics is enabled.

CLIMITS=color

specifies the color for the decision limits, the central line, and related labels in traditional graphics. This option is ignored when ODS Graphics is enabled.

DFE=n

specifies the degrees of freedom n associated with the root mean square error.

GROUPN=value
GROUPN=variable

specifies the group sizes as a constant value or as the values of a variable in the DATA= data set. The GROUPN= option is available only in the PCHART and UCHART statements. You must specify GROUPN= in a PCHART or UCHART statement when your input data set is a DATA= data set.

If you specify multiple responses in a chart statement, the GROUPN= option is used with all of the responses listed.

LDLLABEL='label'

specifies a label for the lower decision limit in the ANOM chart. The label can be of length 16 or less. Enclose the label in quotes. The default label is of the form LDL=value if the decision limit has a fixed value; otherwise, the default label is LDL. A related option is UDLLABEL=.

LIMITK=k

specifies the number of groups for computing decision limits.

LIMITN=n

specifies either a nominal sample size for fixed decision limits or varying limits.

LIMLABSUBCHAR='c'

specifies a substitution character c for labels provided as quoted strings with the LDLLABEL=, UDLLABEL=, PSYMBOL=, USYMBOL=, and XSYMBOL= options. The substitution character must appear in the label. When the label is displayed on the chart, the character is replaced with the value of the corresponding decision limit or center line, provided that this value is constant across groups. Otherwise, the default label for a varying decision limit or center line is displayed.

LLIMITS=linetype

specifies the line type for decision limits in traditional graphics. This option is ignored when ODS Graphics is enabled.

MEAN=value

specifies the (known) mean of the response. This value is used for each response specified in the chart statement.

MSE=value

specifies the mean square error.

NDECIMAL=

specifies the number of digits to the right of decimal place in default labels for decision limits and central line

NOCTL

suppresses display of the central line.

NOLDL

suppresses display of the lower decision limit.

NOLIMITLABEL

suppresses labels for the decision limits and central line.

NOLIMIT0

suppresses display of the lower decision limit if it is 0.

NOLIMIT1

suppresses display of the upper decision limit if it is 1 (100%).

NOLIMITS

suppresses display of the decision limits.

NOLIMITSFRAME

suppresses the default frame around decision limit information when multiple sets of decision limits are read from a LIMITS= data set.

NOLIMITSLEGEND

suppresses the decision limits legend.

NONEEDLES

suppresses the needles connecting points to the center line.

NOREADLIMITS

specifies that the decision limits for each response listed in the chart statement are not to be read from the LIMITS= data set specified in the PROC ANOM statement. There are two basic methods of displaying decision limits: calculating decision limits from the data and reading decision limits from a LIMITS= data set. If you specify a LIMITS= data set but want the decision limits to be calculated from the data, specify the NOREADLIMITS option.

NOUDL

suppresses display of the upper decision limit.

OUTSUMMARY=SAS-data-set
OUT=SAS-data-set
OUTHISTORY=SAS-data-set

creates an output data set that contains group summary statistics. You can use an OUTSUMMARY= data set as a SUMMARY= input data set in a subsequent run of the procedure. You cannot request an OUTSUMMARY= data set if the input data set is a TABLE= data set. See "Output Data Sets" in the section for the chart statement in which you are interested.

P=

specifies the weighted average of group proportions.

PSYMBOL='label'

specifies the label for the central line on an ANOM p chart.

READINDEXES=

reads multiple sets of decision limits for each response from a LIMITS= data set.

TYPE=

identifies parameters as estimates or standard values and specifies value of _TYPE_ in the OUTLIMITS= data set.

U=

specifies the weighted average of group rates.

UDLLABEL=

specifies the label for the upper decision limit.

USYMBOL='label'

specifies the label for the central line on an ANOM u chart.

WLIMITS=

specifies the width for the decision limits and central line in traditional graphics. This option is ignored when ODS Graphics is enabled.

XSYMBOL='label'

specifies the label for the central line on an ANOM chart or ANOM boxchart.