[R] Slight problem in sort

[Marc Schwartz]

On Wed, 2003-08-06 at 16:38, Marc Schwartz wrote:
> On Wed, 2003-08-06 at 16:21, Frank E Harrell Jr wrote:
> > In
> > 
> > platform i686-pc-linux-gnu
> > arch     i686             
> > os       linux-gnu        
> > system   i686, linux-gnu  
> > status                    
> > major    1                
> > minor    7.1              
> > year     2003             
> > month    06               
> > day      16               
> > language R                
> > 
> > I get
> > 
> > > sort(c(3,1,NA))
> > [1] 1 3
> > 
> > Shouldn't NAs be retained by default?
> > 
> > Thanks -Frank
> 
> 
> Frank,
> 
> The default is to exclude NA's based upon the argument 'na.last = NA'. 
> If you set the argument 'na.last' to either TRUE or FALSE, the NA's will
> be kept and sorted either last or first respectively.
> 
> > sort(c(3,1,NA), na.last = TRUE)
> [1]  1  3 NA
> 
> > sort(c(3,1,NA), na.last = LAST)
> [1] NA  1  3
> 
> See ?sort
> 
> HTH,
> 
> Marc Schwartz


Apologies. Bad copy on my part. The second example should be:

> sort(c(3,1,NA), na.last = FALSE)
[1] NA  1  3

Marc