The SHEWHART Procedure

Syntax

BOXSTYLE=POINTSSCHEMATIC: requests a schematic box-and-whisker plot representing each subgroup sample, overlaid with points plotting all the values in the subgroup. This box style combines the POINTS and SCHEMATIC box styles. By default, a square plotting symbol is used to plot the values. You can specify a symbol with the IDSYMBOL= option. You can specify the color of the symbols with the IDCOLOR= option (the default color is the color specified with the CBOXES= option or the second color in the device color list). This option is available only in the BOXCHART statement.
CCOVERLAY=(color-list): specifies colors for the line segments connecting points on primary chart overlays. Colors in the CCOVERLAY= list are matched with variables in the corresponding positions in the OVERLAY= list. By default, points are connected by line segments of the same color as the plotted points. You can specify the value NONE to suppress the line segments connecting points on an overlay.
CCOVERLAY2=(color-list): specifies colors for the line segments connecting points on secondary chart overlays. Colors in the CCOVERLAY2= list are matched with variables in the corresponding positions in the OVERLAY2= list. By default, points are connected by line segments of the same color as the plotted points. You can specify the value NONE to suppress the line segments connecting points on an overlay.
COVERLAY=(color-list): specifies the colors used to plot overlay variables on the primary control chart. Colors in the COVERLAY= list are matched with variables in the corresponding positions in the OVERLAY= list.
COVERLAY2=(color-list): specifies the colors used to plot overlay variables on a secondary control chart. Colors in the COVERLAY2= list are matched with variables in the corresponding positions in the OVERLAY2= list.
COVERLAYCLIP=(color): specifies the color used to plot clipped values on overlay plots. The same color is used for clipped points on primary and secondary chart overlays.
LOVERLAY=(linetypes): specifies line types for the line segments connecting points on primary chart overlays. Line types in the LOVERLAY= list are matched with variables in the corresponding positions in the OVERLAY= list.
LOVERLAY2=(linetypes): specifies line types for the line segments connecting points on secondary chart overlays. Line types in the LOVERLAY2= list are matched with variables in the corresponding positions in the OVERLAY2= list.
MRRESTART
MRRESTART=value: causes the moving range computation on an individual measurements and moving ranges chart to be restarted when a missing value is encountered. Without the MRRESTART option, a missing value is simply skipped, and the moving range for the next non-missing subgroup is computed using the most recent previous non-missing values. MRRESTART restarts the moving range computation, so only the observations after the missing value are used in subsequent moving range computations. You can specify MRRESTART to restart the moving range computation on any missing value, and MRRESTART=value to restart only on a particular missing value. For example, MRRESTART=R will restart the computation only when the missing value ".R" is encountered. This option is valid only in the IRCHART statement.
NOOVERLAYLEGEND: suppresses the legend for overlay variables that is displayed by default when the OVERLAY= or OVERLAY2= option is specified.
OVERLAY=(variable-list): specifies variables to be plotted as overlays on the primary control chart. A point is plotted for each overlay variable at each subgroup for which it has a non-missing value. The value of a particular overlay variable should be the same for each observation in the input data set with a given value of the subgroup variable.
OVERLAY2=(variable-list): specifies variables to be plotted as overlays on a secondary control chart. A point is plotted for each overlay variable at each subgroup for which it has a non-missing value. The value of a particular overlay variable should be the same for each observation in the input data set with a given value of the subgroup variable.
OVERLAY2HTML=(variable-list): specifies variables whose values are URLs to be associated with points on secondary chart overlays. These URLs are associated with points on an overlay plot when graphics output is directed into HTML. Variables in the OVERLAY2HTML= list are matched with variables in the corresponding positions in the OVERLAY2= list. The value of the OVERLAY2HTML= variable should be the same for each observation with a given value of the subgroup variable.
OVERLAY2SYM=(symbol-list): specifies symbols used to plot points on secondary chart overlays. Symbols in the OVERLAY2SYM= list are matched with variables in the corresponding positions in the OVERLAY2= list.
OVERLAY2SYMHT=(value-list): specifies the heights of symbols used to plot points on secondary chart overlays. Heights in the OVERLAY2SYMHT= list are matched with variables in the corresponding positions in the OVERLAY2= list.
OVERLAYCLIPSYM=(symbol): specifies the symbol used to plot clipped values on overlay plots. The same symbol is used on primary and secondary chart overlays.
OVERLAYCLIPSYMHT=(value): specifies the height of the symbol used to plot clipped values on overlay plots. The same height is used on primary and secondary chart overlays.
OVERLAYLEGLAB='label': specifies the label displayed to the left of the overlay legend. The label can be up to 16 characters long and must be enclosed in quotes.
OVERLAYHTML=(variable-list): specifies variables whose values are URLs to be associated with points on primary chart overlays. These URLs are associated with points on an overlay plot when graphics output is directed into HTML. Variables in the OVERLAYHTML= list are matched with variables in the corresponding positions in the OVERLAY= list. The value of the OVERLAYHTML= variable should be the same for each observation with a given value of the subgroup variable.
OVERLAYSYM=(symbol-list): specifies symbols used to plot points on primary chart overlays. Symbols in the OVERLAYSYM= list are matched with variables in the corresponding positions in the OVERLAY= list.
OVERLAYSYMHT=(value-list): specifies the heights of symbols used to plot points on primary chart overlays. Heights in the OVERLAYSYMHT= list are matched with variables in the corresponding positions in the OVERLAY= list.
TESTRESET=variable: enables tests for special causes to be reset on the primary control chart. The specified variable must be a character variable of length 8, or length 16 if customized tests are requested. The variable values have the same format as those of the _TESTS_ variable in a TABLE= data set. A test that is flagged by the TESTRESET= variable value for a given subgroup is reset starting with that subgroup. That means that a positive result for the test can include the given subgroup only if it is the first subgroup in the pattern. For example, the value "12345678" for the TESTRESET= variable will reset all standard tests for special causes. This option is available in all chart statements.
TEST2RESET=variable: enables tests for special causes to be reset on a secondary chart. The specified variable must be a character variable of length 8, or length 16 if customized tests are requested. The variable values have the same format as those of the _TESTS_ variable in a TABLE= data set. A test that is flagged by the TEST2RESET= value for a given subgroup is reset starting with that subgroup. That means a positive result for the test can include the given subgroup only if it is the first subgroup in the pattern. For example, the value "12345678" for the TEST2RESET= variable will reset all standard tests for special causes. This option is available with the MRCHART, RCHART, SCHART, XRCHART, and XSCHART statements.
WOVERLAY=(value-list): specifies the widths in pixels of the line segments connecting points on primary chart overlays. Widths in the WOVERLAY= list are matched with variables in the corresponding positions in the OVERLAY= list.
WOVERLAY2=(value-list): specifies the widths in pixels of the line segments connecting points on secondary chart overlays. Widths in the WOVERLAY2= list are matched with variables in the corresponding positions in the OVERLAY2= list.

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