Positioning an Inset Using Compass Point Values

To position an inset by using a compass point position, specify the value N, NE, E, SE, S, SW, W, or NW with the POSITION= option. The default position of the inset is NW. The following statements produce a histogram to show the position of the inset for the eight compass points:

data Score;
   input Student $ PreTest PostTest @@;
   label ScoreChange = 'Change in Test Scores';
   ScoreChange = PostTest - PreTest;
datalines;
Capalleti  94 91  Dubose     51 65
Engles     95 97  Grant      63 75
Krupski    80 75  Lundsford  92 55
Mcbane     75 78  Mullen     89 82
Nguyen     79 76  Patel      71 77
Si         75 70  Tanaka     87 73
;
run;

title 'Test Scores for a College Course';
proc univariate data=Score noprint;
   histogram PreTest / midpoints = 45 to 95 by 10;
   inset n     / cfill=blank 
                 header='Position = NW' pos=nw;
   inset mean  / cfill=blank 
                 header='Position = N ' pos=n ;
   inset sum   / cfill=blank 
                 header='Position = NE' pos=ne;
   inset max   / cfill=blank 
                 header='Position = E ' pos=e ;
   inset min   / cfill=blank 
                 header='Position = SE' pos=se;
   inset nobs  / cfill=blank 
                 header='Position = S ' pos=s ;
   inset range / cfill=blank 
                 header='Position = SW' pos=sw;
   inset mode  / cfill=blank 
                 header='Position = W ' pos=w ;
   label PreTest = 'Pretest Score';
run;

Figure 4.11 Compass Positions for Inset

Positioning Insets in the Margins

To position an inset in one of the four margins that surround the plot area, specify the value LM, RM, TM, or BM with the POSITION= option. Margin positions are recommended if you list a large number of statistics in the INSET statement. If you attempt to display a lengthy inset in the interior of the plot, the inset is likely to collide with the data display.

Positioning an Inset Using Coordinates

To position an inset with coordinates, use POSITION=(x,y). You specify the coordinates in axis data units or in axis percentage units (the default). Note:You cannot position an inset with coordinates when producing ODS Graphics output.

If you specify the DATA option immediately following the coordinates, PROC UNIVARIATE positions the inset by using axis data units. For example, the following statements place the bottom left corner of the inset at 45 on the horizontal axis and 10 on the vertical axis:

title 'Test Scores for a College Course';
proc univariate data=Score noprint;
   histogram PreTest / midpoints = 45 to 95 by 10;
   inset n / header   = 'Position=(45,10)'
             position = (45,10) data;
run;

Figure 4.12 Coordinate Position for Inset

By default, the specified coordinates determine the position of the bottom left corner of the inset. To change this reference point, use the REFPOINT= option (see below).

If you omit the DATA option, PROC UNIVARIATE positions the inset by using axis percentage units. The coordinates in axis percentage units must be between 0 and 100. The coordinates of the bottom left corner of the display are (0,0), while the upper right corner is (100, 100). For example, the following statements create a histogram and use coordinates in axis percentage units to position the two insets:

title 'Test Scores for a College Course';
proc univariate data=Score noprint;
   histogram PreTest / midpoints = 45 to 95 by 10;
   inset min / position = (5,25)
               header   = 'Position=(5,25)'
               refpoint = tl;
   inset max / position = (95,95)
               header   = 'Position=(95,95)'
               refpoint = tr;
run;

The REFPOINT= option determines which corner of the inset to place at the coordinates that are specified with the POSITION= option. The first inset uses REFPOINT=TL, so that the top left corner of the inset is positioned 5% of the way across the horizontal axis and 25% of the way up the vertical axis. The second inset uses REFPOINT=TR, so that the top right corner of the inset is positioned 95% of the way across the horizontal axis and 95% of the way up the vertical axis.

Figure 4.13 Reference Point for Inset

A sample program for these examples, univar3.sas, is available in the SAS Sample Library for Base SAS software.