[R] Find the function of a line

[Ida Dolciotti]

Hello everybody,

I have drawn a line in a x y plot  that links the minimum and maximum 
points in the plot

plot(xx,yy)

a=max(yy)
b=min(yy)

lines(c(xx[yy==a],xx[yy==b]),c(a,b))

Now I would like to know if it is possible to extrapolate the 
characteristic of the line (intercept and slope).

Is it there and appropriate function for this?

Thanks for your help!

Ida D.

-- 
Ida Dolciotti, M.Sc.
Phd student, Dept. System Ecotoxicology
Helmholtz Centre for Environmental Research - UFZ
Permoserstr. 15
04318 Leipzig

phone:	+49 - 341/235-1498
fax: 	+49 - 341/235-1785

email: ida.dolciotti at ufz.de
website: http://www.ufz.de/index.php?en=17738