PROC PROBIT: INSET Statement :: SAS/STAT(R) 9.2 User's Guide, Second Edition

The PROBIT Procedure

INSET Statement

INSET <keyword-list> </ options> ;

The box or table of summary information produced on plots made with the CDFPLOT, IPPPLOT, LPREDPLOT, or PREDPPLOT statement is called an inset. You can use the INSET statement to customize both the information that is printed in the inset box and the appearance of the inset box. To supply the information that is displayed in the inset box, you specify keywords corresponding to the information you want shown. For example, the following statements produce a predicted probability plot with the number of trials, the number of events, the name of the distribution, and the estimated optimum natural threshold in the inset.

   proc probit data=epidemic;
      model r/n = dose;
      predpplot ;
      inset nobs ntrials nevents dist optc;
   run;

By default, inset entries are identified with appropriate labels. However, you can provide a customized label by specifying the keyword for that entry followed by the equal sign (=) and the label in quotes. For example, the following INSET statement produces an inset containing the number of observations and the name of the distribution, labeled "Sample Size" and "Distribution" in the inset.

   inset nobs='Sample Size' dist='Distribution';

If you specify a keyword that does not apply to the plot you are creating, then the keyword is ignored.

The options control the appearance of the box.

If you specify more than one INSET statement, only the first one is used.

Keywords Used in the INSET Statement

Table 71.8 and Table 71.9 list keywords available in the INSET statement to display summary statistics, distribution parameters, and distribution fitting information.

Table 71.8 Summary Statistics
NOBS	number of observations
NTRIALS	number of trials
NEVENTS	number of events
C	user-input threshold
OPTC	estimated natural threshold
NRESPLEV	number of levels of the response variable

Table 71.9 General Information
CONFIDENCE	confidence coefficient for all confidence intervals or for the Weibayes fit
DIST	name of the distribution

Options Used in the INSET Statement

Table 71.10 and Table 71.11 list the options available in the INSET statement.

Table 71.10 Color and Pattern Options
CFILL=color	specifies color for filling box
CFILLH=color	specifies color for filling box header
CFRAME=color	specifies color for frame
CHEADER=color	specifies color for text in header
CTEXT=color	specifies color for text

Table 71.11 General Appearance Options
FONT=font	specifies software font for text
HEIGHT=value	specifies height of text
HEADER=’quoted string’	specifies text for header or box title
NOFRAME	omits frame around box
POS= value
<DATA \| PERCENT>	determines the position of the inset. The value can be a compass point (N, NE, E, SE, S, SW, W, NW) or a pair of coordinates (x, y) enclosed in parentheses. The coordinates can be specified in axis percentage units or axis data units.
REFPOINT= name	specifies the reference point for an inset that is positioned by a pair of coordinates with the POS= option. You use the REFPOINT= option in conjunction with the POS= coordinates. The REFPOINT= option specifies which corner of the inset frame you have specified with coordinates (x, y), and it can take the value of BR (bottom right), BL (bottom left), TR (top right), or TL (top left). The default is REFPOINT=BL. If the inset position is specified as a compass point, then the REFPOINT= option is ignored.

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