[R] Getting tick positions

[fls]

While writing a function that includes placing grid lines at the same position 
as the axis ticks, I found that the axis* functions don't return anything. 
Thus I have had to copy the appropriate function, removing the call to axis() 
and adding a line to return the tick positions. Is there a more elegant way 
to determine the tick positions on an axis? Thanks.

Jim

(normally bitwrit at ozemail.com.au - my modem is toast)