Summary of Options

QQPLOT Statement

Summary of Options

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

Distribution Options

Table 10.1 summarizes the options for requesting a specific theoretical distribution.

Table 10.1: Keywords to Select a Theoretical Distribution

BETA(beta-options)	specifies beta Q-Q plot for shape parameters $\alpha$ , $\beta$ 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 $\alpha$ specified with mandatory ALPHA= gamma-option
LOGNORMAL(lognormal-options)	specifies lognormal Q-Q plot for shape parameter $\sigma$ specified with mandatory SIGMA= lognormal-option
NORMAL(normal-options)	specifies normal Q-Q plot
WEIBULL(Weibull-options)	specifies three-parameter Weibull Q-Q plot for shape parameter c specified with mandatory C= Weibull-option
WEIBULL2(Weibull2-options)	specifies two-parameter Weibull Q-Q plot

Table 10.2 through Table 10.9 summarize 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 10.2: Reference Line Options Available with All Distributions

COLOR=color	specifies color of distribution reference line
L=linetype	specifies line type of distribution reference line
SYMBOL='character'	specifies plotting character for line printer
W=n	specifies width of distribution reference line

Table 10.3: Beta-Options

ALPHA=value-list\|EST	specifies mandatory shape parameter $\alpha$
BETA=value-list\|EST	specifies mandatory shape parameter $\beta$
SIGMA=value\|EST	specifies reference line slope $\sigma$
THETA=value\|EST	specifies reference line intercept $\theta$

Table 10.4: Exponential-Options

SIGMA=value\|EST	specifies reference line slope $\sigma$
THETA=value\|EST	specifies reference line intercept $\theta$

Table 10.5: Gamma-Options

ALPHA=value-list\|EST	specifies mandatory shape parameter $\alpha$
SIGMA=value\|EST	specifies reference line slope $\sigma$
THETA=value\|EST	specifies reference line intercept $\theta$

Table 10.6: Lognormal-Options

SIGMA=value-list\|EST	specifies mandatory shape parameter $\sigma$
SLOPE=value\|EST	specifies reference line slope
THETA=value\|EST	specifies reference line intercept $\theta$
ZETA=value\|EST	specifies reference line slope $\exp(\zeta_0)$

Table 10.7: Normal-Options

CPKREF	specifies vertical reference lines at intersection of specification limits with distribution reference line
CPKSCALE	rescales horizontal axis in C_pk units
MU=value\|EST	specifies reference line intercept $\mu$
SIGMA=value\|EST	specifies reference line slope $\sigma$

Table 10.8: Weibull-Options

C=value-list\|EST	specifies mandatory shape parameter c
SIGMA=value\|EST	specifies reference line slope $\sigma$
THETA=value\|EST	specifies reference line intercept $\theta$

Table 10.9: Weibull2-Options

C=value\|EST	specifies c₀ for reference line (slope is [1/(c₀)])
SIGMA=value\|EST	specifies $\sigma_0$ for reference line (intercept is $\log(\sigma_0)$ )
SLOPE=value\|EST	specifies reference line slope
THETA=value	specifies known lower threshold $\theta_0$

General Options

Table 10.10 through Table 10.12 list options that control the appearance of the plots.

Table 10.10: General Plot Layout Options

HREF=value-list	specifies reference lines perpendicular to the horizontal axis
HREFLABELS= 'label1' ... 'labeln'	specifies labels for HREF=lines
LEGEND=name \| NONE	specifies LEGEND statement
NADJ=value	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(axis-options)	adds a nonlinear percentile axis
PCTLMINOR	adds minor tick marks to percentile axis
PCTLSCALE	replaces theoretical quantiles with percentiles
RANKADJ=value	adjusts ranks when computing quantiles
ROTATE	switches horizontal and vertical axes
SQUARE	displays Q-Q plot in square format
VREF=value-list	specifies reference lines perpendicular to the vertical axis
VREFLABELS= 'label1' ... 'labeln'	specifies labels for VREF= lines

Table 10.11: Options to Enhance Plots Produced on Line Printers

HREFCHAR='character'	specifies line character for HREF=lines
NOOBSLEGEND	suppresses legend for hidden points
QQSYMBOL='character'	specifies character for plotted points
VREFCHAR='character'	specifies character for VREF= lines

Table 10.12: Options to Enhance Plots Produced on Graphics Devices

ANNOTATE= SAS-data-set	provides an annotate data set
CAXIS=color	specifies color for axis
CFRAME=color	specifies color for frame
CHREF=color	specifies color for HREF=lines
CTEXT=color	specifies color for text
CVREF=color	specifies color for VREF= lines
DESCRIPTION='string'	specifies description for graphics catalog member
FONT=font	specifies software font for text
HAXIS=name	identifies AXIS statement for horizontal axis
HMINOR=n	specifies number of minor tick marks on horizontal axis
LHREF=linetype	specifies line type for HREF=lines
LVREF=linetype	specifies line type for VREF= lines
NAME='string'	specifies name for plot in graphics catalog
VAXIS=name	identifies AXIS statement for vertical axis
VMINOR=value	specifies number of minor tick marks on vertical axis

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