QQPLOT Statement: CAPABILITY Procedure

Summary of Options

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

Distribution Options

Table 5.67 summarizes the options for requesting a specific theoretical distribution.

Table 5.67 Options for Specifying a Theoretical Distribution
Option	Description
BETA(beta-options)	specifies beta Q-Q plot for shape parameters $\text{[math]}$ , $\text{[math]}$ specified with mandatory ALPHA= and BETA= beta-options
EXPONENTIAL(exponential-options)	specifies exponential Q-Q plot
GAMMA(gamma-options)	specifies gamma Q-Q plot for shape parameter $\text{[math]}$ specified with mandatory ALPHA= gamma-option
GUMBEL(Gumbel-options)	specifies Gumbel Q-Q plot
LOGNORMAL(lognormal-options)	specifies lognormal Q-Q plot for shape parameter $\text{[math]}$ specified with mandatory SIGMA= lognormal-option
NORMAL(normal-options)	specifies normal Q-Q plot
PARETO(Pareto-options)	specifies generalized Pareto Q-Q plot for shape parameter $\text{[math]}$ specified with mandatory ALPHA= Pareto-option
POWER(power-options)	specifies power function Q-Q plot for shape parameter $\text{[math]}$ specified with mandatory ALPHA= power-option
RAYLEIGH(Rayleigh-options)	specifies Rayleigh Q-Q plot
WEIBULL(Weibull-options)	specifies three-parameter Weibull Q-Q plot for shape parameter $\text{[math]}$ specified with mandatory C= Weibull-option
WEIBULL2(Weibull2-options)	specifies two-parameter Weibull Q-Q plot

Table 5.68 summarizes options that specify parameter values for theoretical distributions and that 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 Q-Q plot with a specific distribution reference line. The MU= and SIGMA= normal-options display a distribution reference line with intercept 10 and slope 0.3. The COLOR= normal-option draws the line in red.

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

Table 5.68 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 $\text{[math]}$
BETA=	specifies mandatory shape parameter $\text{[math]}$
SIGMA=	specifies reference line slope $\text{[math]}$
THETA=	specifies reference line intercept $\text{[math]}$
Exponential-Options
SIGMA=	specifies reference line slope $\text{[math]}$
THETA=	specifies reference line intercept $\text{[math]}$
Gamma-Options
ALPHA=	specifies mandatory shape parameter $\text{[math]}$
SIGMA=	specifies reference line slope $\text{[math]}$
THETA=	specifies reference line intercept $\text{[math]}$
Gumbel-Options
MU=	specifies reference line intercept $\text{[math]}$
SIGMA=	specifies reference line slope $\text{[math]}$
Lognormal-Options
SIGMA=	specifies mandatory shape parameter $\text{[math]}$
SLOPE=	specifies reference line slope
THETA=	specifies reference line intercept $\text{[math]}$
ZETA=	specifies reference line slope $\text{[math]}$
Normal-Options
CPKREF	specifies vertical reference lines at intersection of specification limits with distribution reference line
CPKSCALE	rescales horizontal axis in $\text{[math]}$ units
MU=	specifies reference line intercept $\text{[math]}$
SIGMA=	specifies reference line slope $\text{[math]}$
Pareto-Options
ALPHA=	specifies mandatory shape parameter $\text{[math]}$
SIGMA=	specifies reference line slope $\text{[math]}$
THETA=	specifies reference line intercept $\text{[math]}$
Power-Options
ALPHA=	specifies mandatory shape parameter $\text{[math]}$
SIGMA=	specifies reference line slope $\text{[math]}$
THETA=	specifies reference line intercept $\text{[math]}$
Rayleigh-Options
SIGMA=	specifies reference line slope $\text{[math]}$
THETA=	specifies reference line intercept $\text{[math]}$
Weibull-Options
C=	specifies mandatory shape parameter $\text{[math]}$
SIGMA=	specifies reference line slope $\text{[math]}$
THETA=	specifies reference line intercept $\text{[math]}$
Weibull2-Options
C=	specifies $\text{[math]}$ for reference line (slope is $\text{[math]}$ )
SIGMA=	specifies $\text{[math]}$ for reference line (intercept is $\text{[math]}$ )
SLOPE=	specifies reference line slope
THETA=	specifies known lower threshold $\text{[math]}$

General Options

Table 5.69 lists options that control the appearance of the plots.

Table 5.69 General QQPLOT Statement Options
Option	Description
General Plot Layout Options
CONTENTS=	specifies table of contents entry for Q-Q plot grouping
HREF=	specifies reference lines perpendicular to the horizontal axis
HREFLABELS=	specifies labels for HREF= lines
LEGEND=	specifies LEGEND statement
NADJ=	adjusts sample size (N) when computing quantiles
NOFRAME	suppresses frame around plotting area
NOLEGEND	suppresses legend
NOLINELEGEND	suppresses distribution reference line information in legend
NOSPECLEGEND	suppresses specifications information in legend
PCTLAXIS	adds a nonlinear percentile axis
PCTLMINOR	adds minor tick marks to percentile axis
PCTLSCALE	replaces theoretical quantiles with percentiles
RANKADJ=	adjusts ranks when computing quantiles
ROTATE	switches horizontal and vertical axes
SQUARE	displays Q-Q plot in square format
VREF=	specifies reference lines perpendicular to the vertical axis
VREFLABELS=	specifies labels for VREF= lines
Graphics Options
ANNOTATE=	specifies annotate data set
CAXIS=	specifies color for axis
CFRAME=	specifies color for frame
CGRID=	specifies color for grid lines
CHREF=	specifies color for HREF= lines
CTEXT=	specifies color for text
CVREF=	specifies color for VREF= lines
DESCRIPTION=	specifies description for plot in graphics catalog
FONT=	specifies software font for text
GRID	draws grid lines perpendicular to the quantile axis
HEIGHT=	specifies height of text used outside framed areas
HMINOR=	specifies number of horizontal minor tick marks
HREFLABPOS=	specifies vertical position of labels for HREF= lines
INFONT=	specifies software font for text inside framed areas
INHEIGHT=	specifies height of text inside framed areas
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
NOHLABEL	suppresses label for horizontal axis
NOVLABEL	suppresses label for vertical axis
NOVTICK	suppresses tick marks and tick mark 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 thickness for grid lines
Options for Comparative Plots
ANNOKEY	applies annotation requested in ANNOTATE= data set to key cell only
CFRAMESIDE=	specifies color for filling frame for row labels
CFRAMETOP=	specifies color for filling frame for column labels
CPROP=	specifies color for proportion of frequency bar
CTEXTSIDE=	specifies color for row labels
CTEXTTOP=	specifies color for column labels
INTERTILE=	specifies distance between tiles
NCOLS=	specifies number of columns in comparative Q-Q plot
NROWS=	specifies number of rows in comparative Q-Q plot
OVERLAY	overlays plots for different class levels (ODS Graphics only)
Options to Enhance Line Printer Plots
HREFCHAR=	specifies line character for HREF= lines
NOOBSLEGEND	suppresses legend for hidden points
QQSYMBOL=	specifies character for plotted points
VREFCHAR=	specifies character for VREF= lines