[R] Plotting POSIXct data: Is this error message for real?

Patrick Connolly p.connolly at hortresearch.co.nz
Mon Feb 17 23:35:04 CET 2003

platform i686-pc-linux-gnu
arch     i686             
os       linux-gnu        
system   i686, linux-gnu  
major    1                
minor    6.2              
year     2003             
month    01               
day      10               
language R                

> x <- paste(1:28, "/02/03", sep = "")
> xct <- as.POSIXct(strptime(x, "%d/%m/%y"))
> count <- rpois(28, 5)
> plot(xct, count, ylab = "something")
Warning message: 
parameter "ylab" couldn't be set in high-level plot() function 

Even though "ylab" can't be set, the resulting plot does succeed.

Compare with:
> plot(as.numeric(xct), count, ylab = "something")

No error (but of course, the x axis isn't much use).
Should the warning really be given?


Patrick Connolly
Mt Albert
New Zealand 
Ph: +64-9 815 4200 x 7188
I have the world`s largest collection of seashells. I keep it on all
the beaches of the world ... Perhaps you`ve seen it.  ---Steven Wright 

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