pushpin.Rd
Adds to an existing 3-d perspective plot a push pin to locate a specific point.
pushpin( x,y,z,p.out, height=.05,col="black",text=NULL,adj=-.1,cex=1.0,...)
x location
y location
z location
Projection information returned by persp
Height of pin in device coordinates (default is about 5% of the vertical distance ).
Color of pin head.
Optional text to go next to pin head.
Position of text relative to pin head.
Character size for pin head and/or text
Additional graphics arguments that are passed to the text function.
See the help(text) for the conventions on
the adj
argument and other options for placing text.
drape.plot,persp
# Dr. R's favorite New Zealand Volcano!
data( volcano)
M<- nrow( volcano)
N<- ncol( volcano)
x<- seq( 0,1,,M)
y<- seq( 0,1,,N)
drape.plot( x,y,volcano, col=terrain.colors(128))-> pm
max( volcano)-> zsummit
xsummit<- x[ row( volcano)[volcano==zsummit]]
ysummit<- y[ col( volcano)[volcano==zsummit]]
pushpin( xsummit,ysummit,zsummit,pm, text="Summit")