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.VE $Header: /usr/s/current/s/.help/RCS/blitid,v 1.3 85/03/05 07:45:49 rab Exp $
.FN blitid
.TL
blitid: Dynamic Point Identification on Blit Terminal
.CS
blitid(x, y, labels)
.PP
.AG x,y
Coordinates of points to be identified.
.AG labels
optional character vector of labels for the points.
Default is character form of `1:len(x)'.
.PP
The `blitid' function causes labels to appear for all points within a
diamond-shaped region surrounding
the cursor. As the cursor is moved among the points,
labels appear as the points enter the region, and disappear as the points
move outside of the region.
.PP
Labels for points identified while button 1 is depressed are "stuck",
i.e., they do not disappear when the cursor moves away.
Button 2 can be used to erase "stuck" labels.
Button 3 changes the size of the region in which identifiers are displayed.
The initial distance is approximately .5 inch.
Exit from `blitid' occurs when buttons 1 and 2 are pressed simultaneously.
.EX
murder <- state.x77[,5]
income <- state.x77[,2]
plot(murder,income)
blitid(murder,income,state.name)
.KW plot*
.KW iplot*
.KW dynamic graphics
.WR
