[R] unexpected plot behavior

[Martin Renner]

When plotting a numerical vector against a factor, 'type="n"' seems to have no affect, e.g. 
> plot (1:10~factor (1:10), type = "n")

looks just like
> plot (1:10~factor (1:10))

Plotting a numerical against itself works as expected: 
> plot (1:10, type = "n")

I see the same behavior under debian gnu/linux, Mac OS X, and Win7 (all current versions, see below). Is this a bug? 

Regards,
Martin
 


Martin Renner
Post-doctoral Fellow				phone: 907-226 4672
University of Washington			   or: 907-235 0728
School of Aquatic and Fishery Sciences		Seattle, USA



> sessionInfo() 
R version 2.15.0 (2012-03-30)
Platform: x86_64-unknown-linux-gnu (64-bit)

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
 [7] LC_PAPER=C                 LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base