[R] lattice -- panel order display

[Luis Ridao Cruz]

R-help,

I'm using 'xyplot' in lattice package which plots length frecuencies by
year (10).
The order I get is not logical and the 'index.cond' argument to
'xyplot' is a bit cumbersome when it comes to plot a great deal of (in
my case years).

I have tried sorting the conditioning variable but still get the same
result.

Is there any easy way to do it without making use of 'index.cond' ?

The function call is as follows:

xyplot ( number ~ cm | as.factor(test$year) , data=test)


Thanks in advance


> version
         _              
platform i386-pc-mingw32
arch     i386           
os       mingw32        
system   i386, mingw32  
status                  
major    2              
minor    0.1            
year     2004           
month    11             
day      15             
language R