NPCHART Statement: SHEWHART Procedure

Summary of Options

The following tables list the NPCHART statement options by function. For complete descriptions, see Dictionary of Options: SHEWHART Procedure.

Table 18.32: NPCHART Statement Options

Option	Description
Options for Specifying Control Limits
ALPHA=	Requests probability limits for chart
LIMITN=	Specifies either nominal sample size for fixed control limits or varying limits
NOREADLIMITS	Computes control limits for each process from the data rather than a LIMITS= data set (SAS 6.10 and later releases)
PROBLIMITS=	Requests probability limits at discrete values
READALPHA	Reads `_ALPHA_` instead of `_SIGMAS_` from a LIMITS= data set
READINDEX=	Reads control limits for each process from a LIMITS= data set
READLIMITS	reads single set of control limits for each process from a LIMITS= data set (SAS 6.09 and earlier releases)
SIGMAS=	Specifies width of control limits in terms of multiple k of standard error of plotted means
Options for Displaying Control Limits
ACTUALALPHA	Displays the actual probability of a point being outside the control limits in the control limits legend
CINFILL=	Specifies color for area inside control limits
CLIMITS=	Specifies color of control limits, central line, and related labels
LCLLABEL=	Specifies label for lower control limit
LIMLABSUBCHAR=	Specifies a substitution character for labels provided as quoted strings; the character is replaced with the value of the control limit
LLIMITS=	Specifies line type for control limits
NDECIMAL=	Specifies number of digits to right of decimal place in default Labels for control limits and central line
NOCTL	Suppresses display of central line
NOLCL	Suppresses display of lower control limit
NOLIMIT0	Suppresses display of lower control limit if it is 0
NOLIMIT1	Suppresses display of upper control limit if it is 1 (100%)
NOLIMITLABEL	Suppresses labels for control limits and central line
NOLIMITS	Suppresses display of control limits
NOLIMITSFRAME	Suppresses default frame around control limit information when multiple sets of control limits are read from a LIMITS= data set
NOLIMITSLEGEND	Suppresses legend for control limits
NOUCL	Suppresses display of upper control limit
NPSYMBOL=	Specifies label for central line
UCLLABEL=	Specifies label for upper control limit
WLIMITS=	Specifies width for control limits and central line
Standard Value Options
P0=	Specifies known (standard) value $p_{0}$ for proportion of nonconforming items
TYPE=	Identifies parameters as estimates or standard values and specifies value of `_TYPE_` in the OUTLIMITS= data set
Options for Plotting and Labeling Points
ALLLABEL=	Labels every point on $np$ chart
CLABEL=	Specifies color for labels
CCONNECT=	Specifies color for line segments that connect points on chart
CFRAMELAB=	Specifies fill color for frame around labeled points
CNEEDLES=	Specifies color for needles that connect points to central line
COUT=	Specifies color for portions of line segments that connect points outside control limits
COUTFILL=	Specifies color for shading areas between the connected points and control limits outside the limits
LABELANGLE=	Specifies angle at which labels are drawn
LABELFONT=	Specifies software font for labels (alias for the TESTFONT= option)
LABELHEIGHT=	Specifies height of labels (alias for the TESTHEIGHT= option)
NEEDLES	Connects points to central line with vertical needles
NOCONNECT	Suppresses line segments that connect points on chart
OUTLABEL=	Labels points outside control limits
SYMBOLLEGEND=	Specifies LEGEND statement for levels of symbol-variable
SYMBOLORDER=	Specifies order in which symbols are assigned for levels of symbol-variable
TURNALL\|TURNOUT	Turns point labels so that they are strung out vertically
WNEEDLES=	Specifies width of needles
Options for Specifying Tests for Special Causes
INDEPENDENTZONES	Computes zone widths independently above and below center line
NO3SIGMACHECK	Enables tests to be applied with control limits other than $3\sigma$ limits
NOTESTACROSS	Suppresses tests across phase boundaries
TESTS=	Specifies tests for special causes
TEST2RUN=	Specifies length of pattern for Test 2
TEST3RUN=	Specifies length of pattern for Test 3
TESTACROSS	Applies tests across phase boundaries
TESTLABEL=	Provides labels for points where test is positive
TESTLABELn=	Specifies label for nth test for special causes
TESTNMETHOD=	Applies tests to standardized chart statistics
TESTOVERLAP	Performs tests on overlapping patterns of points
TESTRESET=	Enables tests for special causes to be reset
WESTGARD=	Requests that Westgard rules be applied
ZONELABELS	Adds labels A, B, and C to zone lines
ZONES	Adds lines delineating zones A, B, and C
ZONEVALPOS=	Specifies position of ZONEVALUES labels
ZONEVALUES	Labels zone lines with their values
Options for Displaying Tests for Special Causes
CTESTLABBOX=	Specifies color for boxes enclosing labels indicating points where test is positive
CTESTS=	Specifies color for labels indicating points where test is positive
CTESTSYMBOL=	Specifies color for symbol used to plot points where test is positive
CZONES=	Specifies color for lines and labels delineating zones A, B, and C
LTESTS=	Specifies type of line connecting points where test is positive
LZONES=	Specifies line type for lines delineating zones A, B, and C
TESTFONT=	Specifies software font for labels at points where test is positive
TESTHEIGHT=	Specifies height of labels at points where test is positive
TESTLABBOX	Requests that labels for points where test is positive be positioned so that do not overlap
TESTSYMBOL=	Specifies plot symbol for points where test is positive
TESTSYMBOLHT=	Specifies symbol height for points where test is positive
WTESTS=	Specifies width of line connecting points where test is positive
Axis and Axis Label Options
CAXIS=	Specifies color for axis lines and tick marks
CFRAME=	Specifies fill colors for frame for plot area
CTEXT=	Specifies color for tick mark values and axis labels
DISCRETE	Produces horizontal axis for discrete numeric group values
HAXIS=	Specifies major tick mark values for horizontal axis
HEIGHT=	Specifies height of axis label and axis legend text
HMINOR=	Specifies number of minor tick marks between major tick marks on horizontal axis
HOFFSET=	Specifies length of offset at both ends of horizontal axis
INTSTART=	Specifies first major tick mark value on horizontal axis when a date, time, or datetime format is associated with numeric subgroup variable
NOHLABEL	Suppresses label for horizontal axis
NOTICKREP	Specifies that only the first occurrence of repeated, adjacent subgroup values is to be labeled on horizontal axis
NOTRUNC	Suppresses vertical axis truncation at zero applied by default
NOVANGLE	Requests vertical axis labels that are strung out vertically
NOVLABEL	Suppresses label for primary vertical axis
SKIPHLABELS=	Specifies thinning factor for tick mark labels on horizontal axis
TURNHLABELS	Requests horizontal axis labels that are strung out vertically
VAXIS=	Specifies major tick mark values for vertical axis
VFORMAT=	Specifies format for vertical axis tick mark labels
VMINOR=	Specifies number of minor tick marks between major tick marks on vertical axis
VOFFSET=	Specifies length of offset at both ends of vertical axis
VZERO	Forces origin to be included in vertical axis
WAXIS=	Specifies width of axis lines
Plot Layout Options
ALLN	Plots means for all subgroups
BILEVEL	Creates control charts using half-screens and half-pages
EXCHART	Creates control charts for a process only when exceptions occur
INTERVAL=	natural time interval between consecutive subgroup positions when time, date, or datetime format is associated with a numeric subgroup variable
MAXPANELS=	maximum number of pages or screens for chart
NMARKERS	Requests special markers for points corresponding to sample sizes not equal to nominal sample size for fixed control limits
NOCHART	Suppresses creation of chart
NOFRAME	Suppresses frame for plot area
NOLEGEND	Suppresses legend for subgroup sample sizes
NPANELPOS=	Specifies number of subgroup positions per panel on each chart
REPEAT	Repeats last subgroup position on panel as first subgroup position of next panel
TOTPANELS=	Specifies number of pages or screens to be used to display chart
ZEROSTD	Displays $np$ chart regardless of whether $\hat{\sigma } = 0$
Reference Line Options
CHREF=	Specifies color for lines requested by HREF= options
CVREF=	Specifies color for lines requested by VREF= options
HREF=	Specifies position of reference lines perpendicular to horizontal axis
HREFDATA=	Specifies position of reference lines perpendicular to horizontal axis
HREFLABELS=	Specifies labels for HREF= lines
HREFLABPOS=	Specifies position of HREFLABELS= labels
LHREF=	Specifies line type for HREF= lines
LVREF=	Specifies line type for VREF= lines
NOBYREF	Specifies that reference line information in a data set applies uniformly to charts created for all BY groups
VREF=	Specifies position of reference lines perpendicular to vertical axis
VREFLABELS=	Specifies labels for VREF= lines
VREFLABPOS=	position of VREFLABELS= labels
Grid Options
CGRID=	Specifies color for grid requested with GRID or ENDGRID option
ENDGRID	Adds grid after last plotted point
GRID	Adds grid to control chart
LENDGRID=	Specifies line type for grid requested with the ENDGRID option
LGRID=	Specifies line type for grid requested with the GRID option
WGRID=	Specifies width of grid lines
Clipping Options
CCLIP=	Specifies color for plot symbol for clipped points
CLIPFACTOR=	Determines extent to which extreme points are clipped
CLIPLEGEND=	Specifies text for clipping legend
CLIPLEGPOS=	Specifies position of clipping legend
CLIPSUBCHAR=	Specifies substitution character for CLIPLEGEND= text
CLIPSYMBOL=	Specifies plot symbol for clipped points
CLIPSYMBOLHT=	Specifies symbol marker height for clipped points
Graphical Enhancement Options
ANNOTATE=	Specifies annotate data set that adds features chart
DESCRIPTION=	Specifies description of $np$ chart’s GRSEG catalog entry
FONT=	Specifies software font for labels and legends on charts
NAME=	Specifies name of $np$ chart’s GRSEG catalog entry
PAGENUM=	Specifies the form of the label used in pagination
PAGENUMPOS=	Specifies the position of the page number requested with the PAGENUM= option

Options for Producing Graphs Using ODS Styles
BLOCKVAR=	Specifies one or more variables whose values define colors for filling background of block-variable legend
CFRAMELAB	Draws a frame around labeled points
COUT	draw portions of line segments that connect points outside control limits in a contrasting color
CSTAROUT	Specifies that portions of stars exceeding inner or outer circles are drawn using a different color
OUTFILL	Shades areas between control limits and connected points lying outside the limits
STARFILL=	Specifies a variable identfying groups of stars filled with different colors
STARS=	Specifies a variable identfying groups of stars whose outlines are drawn with different colors

Options for ODS Graphics
BLOCKREFTRANSPARENCY=	Specifies the wall fill transparency for blocks and phases
INFILLTRANSPARENCY=	Specifies the control limit infill transparency
MARKERS	Plots subgroup points with markers
NOBLOCKREF	Suppresses block and phase reference lines
NOBLOCKREFFILL	Suppresses block and phase wall fills
NOFILLLEGEND	Suppresses legend for levels of a STARFILL= variable
NOPHASEREF	Suppresses block and phase reference lines
NOPHASEREFFILL	Suppresses block and phase wall fills
NOREF	Suppresses block and phase reference lines
NOREFFILL	Suppresses block and phase wall fills
NOSTARFILLLEGEND	Suppresses legend for levels of a STARFILL= variable
NOTRANSPARENCY	Disables transparency in ODS Graphics output
ODSFOOTNOTE=	Specifies a graph footnote
ODSFOOTNOTE2=	Specifies a secondary graph footnote
ODSLEGENDEXPAND	Specifies that legend entries contain all levels observed in the data
ODSTITLE=	Specifies a graph title
ODSTITLE2=	Specifies a secondary graph title
OUTFILLTRANSPARENCY=	Specifies control limit outfill transparency
OVERLAYURL=	Specifies URLs to associate with overlay points
PHASEPOS=	Specifies vertical position of phase legend
PHASEREFLEVEL=	Associates phase and block reference lines with either innermost or the outermost level
PHASEREFTRANSPARENCY=	Specifies the wall fill transparency for blocks and phases
REFFILLTRANSPARENCY=	Specifies the wall fill transparency for blocks and phases
SIMULATEQCFONT	Draws central line labels using a simulated software font
STARTRANSPARENCY=	Specifies star fill transparency
URL=	Specifies a variable whose values are URLs to be associated with subgroups
Input Data Set Options
DATAUNIT	Specifies that input values are proportions or percentages (rather than counts) of nonconforming items
MISSBREAK	Specifies that observations with missing values are not to be processed
SUBGROUPN	Specifies subgroup sample sizes as constant number n or as values of variable in a DATA= data set
Output Data Set Options
OUTHISTORY=	Creates output data set containing subgroup summary statistics
OUTINDEX=	Specifies value of `_INDEX_` in the OUTLIMITS= data set
OUTLIMITS=	Creates output data set containing control limits
OUTTABLE=	Creates output data set containing subgroup summary statistics and control limits
Tabulation Options
Note: specifying (EXCEPTIONS) after a tabulation option creates a table for exceptional points only.
TABLE	Creates a basic table of subgroup means, subgroup sample sizes, and control limits
TABLEALL	is equivalent to the options TABLE, TABLECENTRAL, TABLEID, TABLELEGEND, TABLEOUTLIM, and TABLETESTS
TABLECENTRAL	Augments basic table with values of central lines
TABLEID	Augments basic table with columns for ID variables
TABLELEGEND	Augments basic table with legend for tests for special causes
TABLEOUTLIM	Augments basic table with columns indicating control limits exceeded
TABLETESTS	Augments basic table with a column indicating which tests for special causes are positive
Block Variable Legend Options
BLOCKLABELPOS=	Specifies position of label for block-variable legend
BLOCKLABTYPE=	Specifies text size of block-variable legend
BLOCKPOS=	Specifies vertical position of block-variable legend
BLOCKREP	Repeats identical consecutive labels in block-variable legend
CBLOCKLAB=	Specifies fill colors for frames enclosing variable labels in block-variable legend
CBLOCKVAR=	Specifies one or more variables whose values are colors for filling background of block-variable legend
Phase Options
CPHASELEG=	Specifies text color for phase legend
NOPHASEFRAME	Suppresses default frame for phase legend
OUTPHASE=	Specifies value of `_PHASE_` in the OUTHISTORY= data set
PHASEBREAK	Disconnects last point in a phase from first point in next phase
PHASELABTYPE=	Specifies text size of phase legend
PHASELEGEND	Displays phase labels in a legend across top of chart
PHASELIMITS	Labels control limits for each phase, provided they are constant within that phase
PHASEREF	delineates phases with vertical reference lines
READPHASES=	Specifies phases to be read from an input data set
Star Options
CSTARCIRCLES=	Specifies color for STARCIRCLES= circles
CSTARFILL=	Specifies color for filling stars
CSTAROUT=	Specifies outline color for stars exceeding inner or outer circles
CSTARS=	Specifies color for outlines of stars
LSTARCIRCLES=	Specifies line types for STARCIRCLES= circles
LSTARS=	Specifies line types for outlines of STARVERTICES= stars
STARBDRADIUS=	Specifies radius of outer bound circle for vertices of stars
STARCIRCLES=	Specifies reference circles for stars
STARINRADIUS=	Specifies inner radius of stars
STARLABEL=	Specifies vertices to be labeled
STARLEGEND=	Specifies style of legend for star vertices
STARLEGENDLAB=	Specifies label for STARLEGEND= legend
STAROUTRADIUS=	Specifies outer radius of stars
STARSPECS=	Specifies method used to standardize vertex variables
STARSTART=	Specifies angle for first vertex
STARTYPE=	Specifies graphical style of star
STARVERTICES=	superimposes star at each point on chart
WSTARCIRCLES=	Specifies width of STARCIRCLES= circles
WSTARS=	Specifies width of STARVERTICES= stars
Overlay Options
CCOVERLAY=	Specifies colors for overlay line segments
COVERLAY=	Specifies colors for overlay plots
COVERLAYCLIP=	Specifies color for clipped points on overlays
LOVERLAY=	Specifies line types for overlay line segments
NOOVERLAYLEGEND	Suppresses legend for overlay plots
OVERLAY=	Specifies variables to overlay on chart
OVERLAYCLIPSYM=	Specifies symbol for clipped points on overlays
OVERLAYCLIPSYMHT=	Specifies symbol height for clipped points on overlays
OVERLAYHTML=	Specifies links to associate with overlay points
OVERLAYID=	Specifies labels for overlay points
OVERLAYLEGLAB=	Specifies label for overlay legend
OVERLAYSYM=	Specifies symbols for overlays
OVERLAYSYMHT=	Specifies symbol heights for overlays
WOVERLAY=	Specifies widths of overlay line segments
Options for Interactive Control Charts
HTML=	Specifies a variable whose values create links to be associated with subgroups
HTML_LEGEND=	Specifies a variable whose values create links to be associated with symbols in the symbol legend
WEBOUT=	Creates an OUTTABLE= data set with additional graphics coordinate data
Options for Line Printer Charts
CLIPCHAR=	Specifies plot character for clipped points
CONNECTCHAR=	Specifies character used to form line segments that connect points on chart
HREFCHAR=	Specifies line character for HREF= lines
SYMBOLCHARS=	Specifies characters indicating symbol-variable
TESTCHAR=	Specifies character for line segments that connect any sequence of points for which a test for special causes is positive
VREFCHAR=	Specifies line character for VREF= lines
ZONECHAR=	Specifies character for lines that delineate zones for tests for special causes