[R] annotating time axis by axis.POSIXct

[Petr PIKAL]

Dear all

I try to format labels on axis as standard ones does not look well, but I 
am not able to make axis.POSIXct to work. here is an example

x<-seq(as.Date("2008-1-1"), as.Date("2009-9-6"), by="2 months")
y<-rnorm(11)
plot(x,y) #not very sophisticated axis

plot(x,y, axes=F)
axis(2)
axis.POSIXct(1, at=x, format="%m/%Y") # no axis

The same is on R2.10.0, 2.10.dev and 2.11.dev

R session

> version
               _ 
platform       i386-pc-mingw32 
arch           i386 
os             mingw32 
system         i386, mingw32 
status 
major          2 
minor          10.0 
year           2009 
month          10 
day            26 
svn rev        50208 
language       R 
version.string R version 2.10.0 (2009-10-26)

Czech Locale

Is it a bug or am I missing something?

regards
Petr