[R] Dates labels on axes in xyplot

[Dirk Eddelbuettel]

On 9 February 2005 at 14:37, Denham Robert wrote:
| I am a bit confused about how to get the format of the labels in xyplot
| to show as dates rather than the numeric value.
|  
| e.g., 
|  
| x <- as.Date(c("20/01/2001","20/02/2003","21/06/2004"),"%d/%m/%Y")
| y <- c(1,2,3)
|  
| plot(y~x)     #produces formatted labels
|  
| xyplot(y~x)  #doesn't give formatted x labels
|  
| xyplot(y~x,scales=list(x=list(format="%d/%m/%Y"))) #still doesn't.
|  
| How do I get the format for the xlabels ?

You need another as.POSIXct():

> x <- as.POSIXct(as.Date(c("20/01/2001","20/02/2003","21/06/2004"),"%d/%m/%Y"))
> y <- c(1,2,3)
> xyplot(y~x)

Dirk

-- 
Better to have an approximate answer to the right question than a precise 
answer to the wrong question.  --  John Tukey as quoted by John Chambers