[R] locator in multiple graphics

[Uwe Ligges]

solares at unsl.edu.ar wrote:

> hello, how i cant with function locator() know the coordinates of two 
> function graphicated in the same graphical area, the return coordinates 
> which are they , of one function or the another function:
> 
> |    f
> |   /(click here)  locator(1), return (x,y) of f or g function?
> |  /
> | / 
> |/~~~~~g
> |________________
> 

Might be neither!
It returns a value specified in user coordinates of the plotting region 
at the time locator() was called. ?locator could be a bit more specific 
here ...


Try

  plot(1:10)
  locator()
  par("usr" = c(101,110,101,100))
  locator()

as an example


Uwe Ligges