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The CAPABILITY Procedure

Summary of Options

The following tables list the PROBPLOT statement options by function. For complete descriptions, see the section Dictionary of Options.

Distribution Options

Table 5.59 summarizes the options for requesting a specific theoretical distribution.

Table 5.59 Options for Specifying a Theoretical Distribution

Option

Description

BETA(beta-options)

specifies beta probability plot for shape parameters , specified with mandatory ALPHA= and BETA= beta-options

EXPONENTIAL(exponential-options)

specifies exponential probability plot

GAMMA(gamma-options)

specifies gamma probability plot for shape parameter specified with mandatory ALPHA= gamma-option

LOGNORMAL(lognormal-options)

specifies lognormal probability plot for shape parameter specified with mandatory SIGMA= lognormal-option

NORMAL(normal-options)

specifies normal probability plot

WEIBULL(Weibull-options)

specifies three-parameter Weibull probability plot for shape parameter specified with mandatory C= Weibull-option

WEIBULL2(Weibull2-options)

specifies two-parameter Weibull probability plot

Table 5.60 summarizes options that specify distribution parameters and control the display of a distribution reference line. Specify these options in parentheses after the distribution option. For example, the following statements use the NORMAL option to request a normal probability plot with a distribution reference line:

proc capability data=measures;
   probplot length / normal(mu=10 sigma=0.3 color=red);
run;

The MU= and SIGMA= normal-options display a distribution reference line that corresponds to the normal distribution with mean and standard deviation , and the COLOR= normal-option specifies the color for the line.

Table 5.60 Distribution Options

Option

Description

Distribution Reference Line Options

COLOR=

specifies color of distribution reference line

L=

specifies line type of distribution reference line

SYMBOL=

specifies plotting character for line printer plots

W=

specifies width of distribution reference line

Beta-Options

ALPHA=

specifies mandatory shape parameter

BETA=

specifies mandatory shape parameter

SIGMA=

specifies for distribution reference line

THETA=

specifies for distribution reference line

Exponential-Options

SIGMA=

specifies for distribution reference line

THETA=

specifies for distribution reference line

Gamma-Options

ALPHA=

specifies mandatory shape parameter

SIGMA=

specifies for distribution reference line

THETA=

specifies for distribution reference line

Lognormal-Options

SIGMA=

specifies mandatory shape parameter

SLOPE=

specifies slope of distribution reference line

THETA=

specifies for distribution reference line

ZETA=

specifies for distribution reference line (slope is )

Normal-Options

MU=

specifies for distribution reference line

SIGMA=

specifies for distribution reference line

Weibull-Options

C=

specifies mandatory shape parameter

SIGMA=

specifies for distribution reference line

THETA=

specifies for distribution reference line

Weibull2-Options

C=

specifies for distribution reference line (slope is )

SIGMA=

specifies for distribution reference line (intercept is )

SLOPE=

specifies slope of distribution reference line

THETA=

specifies known lower threshold

General Options

Table 5.61 lists options that control the appearance of the plots.

Table 5.61 General PROBPLOT Statement Options

Option

Description

General Plot Layout Options

CONTENTS=

specifies table of contents entry for probability plot grouping

GRID

draws grid lines perpendicular to the percentile axis

HREF=

specifies reference lines perpendicular to the horizontal axis

HREFLABELS=

specifies line labels for HREF= lines

LEGEND=

identifies LEGEND statement

NADJ=

adjusts sample size (N) when computing percentiles

NOFRAME

suppresses frame around plotting area

NOLEGEND

suppresses legend

NOLINELEGEND

suppresses distribution reference line information in legend

NOSPECLEGEND

suppresses specifications information in legend

PCTLMINOR

requests minor tick marks for percentile axis

PCTLORDER=

specifies tick mark labels for percentile axis

RANKADJ=

adjusts ranks when computing percentiles

ROTATE

switches horizontal and vertical axes

SQUARE

displays plot in square format

VREF=

specifies reference lines perpendicular to the vertical axis

VREFLABELS=

specifies line labels for VREF= lines

Graphics Options

ANNOKEY

applies annotation to key cell only

ANNOTATE=

specifies annotate data set

CAXIS=

specifies color for axis

CFRAME=

specifies color for frame

CFRAMESIDE=

specifies color for filling frame for row labels

CFRAMETOP=

specifies color for filling frame for column labels

CGRID=

specifies color for grid lines

CHREF=

specifies color for HREF= lines

CPROP=

specifies color for proportion of frequency bar

CTEXT=

specifies color for text

CTEXTSIDE=

specifies color for row labels

CTEXTTOP=

specifies color for column labels

CVREF=

specifies color for VREF= lines

DESCRIPTION=

specifies description for plot in graphics catalog

FONT=

specifies software font for text

HAXIS=

specifies AXIS statement for horizontal axis

HEIGHT=

specifies height of text used outside framed areas

HMINOR=

specifies number of horizontal minor tick marks

HREFLABPOS=

specifies position for HREF= line labels

INFONT=

specifies software font for text inside framed areas

INHEIGHT=

specifies height of text inside framed areas

INTERTILE=

specifies distance between tiles

LGRID=

specifies a line type for grid lines

LHREF=

specifies line style for HREF= lines

LVREF=

specifies line style for VREF= lines

NAME=

specifies name for plot in graphics catalog

NCOLS=

specifies number of columns in comparative probability plot

NOHLABEL

suppresses label for horizontal axis

NOVLABEL

suppresses label for vertical axis

NOVTICK

suppresses tick marks and tick mark labels for vertical axis

NROWS=

specifies number of rows in comparative probability plot

OVERLAY

overlays plots for different class levels (ODS Graphics only)

TURNVLABELS

turns and vertically strings out characters in labels for vertical axis

VAXIS=

specifies AXIS statement for vertical axis

VAXISLABEL=

specifies label for vertical axis

VMINOR=

specifies number of vertical minor tick marks

VREFLABPOS=

specifies horizontal position of labels for VREF= lines

WAXIS=

specifies line thickness for axes and frame

WGRID=

specifies line thickness for grid

Options to Enhance Line Printer Plots

GRIDCHAR=

specifies character for GRID lines

HREFCHAR=

specifies character for HREF= lines

NOOBSLEGEND

suppresses legend for hidden points

PROBSYMBOL=

specifies character for plotted points

VREFCHAR=

specifies character for VREF= lines

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