[R] How to define specific location of tick marks in plot()

[DJNordlund@aol.com]

Hi,

I wish to create a series of plots  with the same x-axis range and the same 
placement of tick marks.  In  addition I want to force the tick marks to be at 
specific locations.  For  example, if I wish to have an x-axis which goes from 
40 to 110, with tick marks  at 40, 50, 60, ... , How can I accomplish that?  
The various parameters I  have tried changing just seem to be suggestions for 
an internal  definition.

I'm sure this is easy, but I'm obviously missing something in  the 
docmentation.

Dan Nordlund