Sum: [R] Reset par(xaxp) in plot

[Yang, Richard]

Many thanks to Peter Dalgaard BSA and Uwe Uwe Ligges for their prompt
responses. It turns out xaxp can not be set by par(xaxp = c(x1, x2, n)) as
indicatedd in Help for 'par' document. Both pointed me to the right
direction by setting axes = F or xaxt = "n" in plot() and using axis(1,
seq=c(0,150,15)) to produce an axis with desired intervals. 

Richard

My original question:
 
> R-Helpers;
> 
> 	This seems simple to set graphic parameter, but I tried 
> plot a graph
> with 10 intervals in x axis with  par(xaxp = c(0, 150, 10) 
> but to no avail:
> 
> 	par(xaxp =c (0, 150,  10))
> 	plot(age, y18, type="n", ylab="Height (m)", xlab=" age 
> (Yrs)", font
> = 2)
> 	lines(age, y6, lty = 4, lwd = 2)
> 	lnes(age, y10, lty = 1, lwd =2)
> 	lines(age, y14, lty = 2, lwd =2)
> 	lines(age, y18, lty = 3, lwd = 2)
> 	abline(v=50)
> 
> The plot shown only 3 intervals with tick at 0, 50, 100, and 150. and 
> 
> > par()$xaxp
> [1]   0 150   3
> 
> 	I use current version Lattice and Grid.
> 
> > version
>          _              
> platform i386-pc-mingw32
> arch     i386           
> os       mingw32        
> system   i386, mingw32  
> status   Patched        
> major    1              
> minor    5.0            
> year     2002           
> month    05             
> day      15             
> language R          
> 
> 	What did I miss?
> 
> Richard
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