You can use the PROBPLOT statement to create a probability plot from lifetime data. The data can be uncensored, right censored, or arbitrarily censored. You can specify any number of PROBPLOT statements after a MODEL statement. The syntax used for the response in the MODEL statement determines the type of censoring assumed in creating the probability plot. The model fit with the MODEL statement is plotted along with the data. If there are covariates in the model, they are set to constant values specified in the XDATA= data set when creating the probability plot. If no XDATA= data set is specified, continuous variables are set to their overall mean values and categorical variables specified in the CLASS statement are set to their highest levels.
Table 57.12 summarizes the options available in the PROBPLOT statement.
Table 57.12: PROBPLOT Statement Options
Option |
Description |
---|---|
Traditional Graphics |
|
Specifies an Annotate data set |
|
Specifies the color used for the axes and tick marks |
|
Specifies the color for filling the censor plot area |
|
Plots censored data as frequency counts |
|
Specifies the color for the censor symbol |
|
Specifies symbols for censored values |
|
Specifies the color for the fitted probability line and confidence curves |
|
Specifies the color for the area enclosed by the axes and frame |
|
Specifies the color for grid lines |
|
Specifies the color for lines requested by the HREF= option |
|
Specifies the color for tick mark values and axis labels |
|
Specifies the color for lines requested by the VREF= option |
|
Specifies a description that appears in the PROC GREPLAY master menu |
|
Specifies a software font for reference line and axis labels |
|
Computes and draws confidence limits |
|
Specifies the height of text used outside framed areas |
|
Specifies the lower limit on the lifetime axis scale |
|
Specifies the offset for the horizontal axis |
|
Specifies value as the upper lifetime axis tick mark |
|
Draws reference lines perpendicular to the horizontal axis |
|
Specifies labels for the lines requested by the HREF= option |
|
Specifies the vertical position of labels for HREF= lines |
|
Requests a border around probability plots |
|
Specifies the distance between tiles |
|
Displays the iteration history for the Turnbull algorithm |
|
Specifies the amount to jitter overlaying plot symbols, in units of symbol width |
|
Specifies a line style for fitted curves and confidence limits |
|
Specifies a line style for all grid lines |
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Specifies the line type for lines requested by the HREF= option |
|
Specifies the line type for lines requested by the VREF= option |
|
Specifies the maximum number of iterations for the Turnbull algorithm |
|
Specifies a name for the plot |
|
Suppresses the plotting of censored data points |
|
Suppresses the default confidence bands |
|
Suppresses plotting of the estimated empirical probability plot |
|
Suppresses the fitted probability (percentile) line and confidence bands |
|
Suppresses the frame around plotting areas |
|
Suppresses grid lines |
|
Suppresses horizontal label |
|
Suppresses horizontal tick marks |
|
Suppresses setting small interval probabilities to zero |
|
Suppresses vertical labels |
|
Suppresses vertical tick marks |
|
Displays one of the two kinds of confidence limit |
|
Specifies the list of percentages for which to compute percentile estimates |
|
Specifies the lower limit on the probability axis scale |
|
Displays intervals and associated probabilities for the Turnbull algorithm |
|
Specifies the upper limit on the probability axis scale |
|
Specifies the plotting position type |
|
Displays a table of the cumulative probabilities |
|
Specifies the list of initial values for the Turnbull algorithm |
|
Requests probability plots with probability scale on the horizontal axis |
|
Makes the layout of the probability plots square |
|
Specifies the criterion for convergence in the Turnbull algorithm |
|
Specifies the criterion for setting the interval probability to zero in the Turnbull algorithm |
|
Specifies a label for the vertical axis |
|
Draws reference lines perpendicular to the vertical axis |
|
Specifies labels for the lines requested by the VREF= option |
|
Specifies the horizontal position of labels for VREF= lines |
|
Specifies line thickness for axes and frame |
|
Specifies line thickness for fitted curves |
|
Specifies line thickness for grids |
|
Specifies line thickness for reference lines |
|
ODS Graphics |
|
Computes and draws confidence limits for the predicted probabilities |
|
Specifies value as the lower lifetime axis tick mark |
|
Specifies value as the upper lifetime axis tick mark |
|
Draws reference lines perpendicular to the horizontal axis |
|
Specifies labels for the lines requested by the HREF= option |
|
Displays the iteration history for the Turnbull algorithm |
|
Specifies the maximum number of iterations for the Turnbull algorithm |
|
Suppresses the plotting of censored data points |
|
Suppresses the default confidence bands |
|
Suppresses plotting of the estimated empirical probability plot |
|
Suppresses the fitted probability (percentile) line and confidence bands |
|
Suppresses the frame around plotting areas |
|
Suppresses grid lines |
|
Suppresses setting small interval probabilities to zero in the Turnbull algorithm |
|
Displays one of the two kinds of confidence limits |
|
Specifies the list of percentages for which to compute percentile estimates |
|
Specifies the lower limit on the probability axis scale |
|
Displays intervals and associated probabilities for the Turnbull algorithm |
|
Specifies the upper limit on the probability axis scale |
|
Specifies the plotting position type |
|
Displays a table of the cumulative probabilities |
|
Specifies the list of initial values for the Turnbull algorithm |
|
Requests probability plots with probability scale on the horizontal axis |
|
Makes the layout of the probability plots square |
|
Specifies the criterion for convergence in the Turnbull algorithm |
|
Specifies the criterion for setting the interval probability to zero in the Turnbull algorithm |
|
Draws reference lines perpendicular to the vertical axis |
You can specify the following options to control the content, layout, and appearance of a probability plot.
The following options are available if you use traditional graphics—that is, if ODS Graphics is not enabled.