[R] How to draw x-axis time label.

[Ivy_Li]

Hi everybody,
	Could I consult one problem?
	It is about plot 
	Now I do some analysis in plot . I need to draw a plot which x-axis is time . But when I run the funtion of plot . The x-label are very oddness number, such as the time is "2004-08-05 09:08:48", but the x-label is 1091800000. I don't know how to do . 
	I have an example . Mybe It  can explain my meaning clearly.
	Thank you for helping me!

Time <- c("2004-08-05 09:08:48", "2004-08-13 20:53:38",
  	"2004-08-14 13:57:23", "2004-08-12 16:17:41", 
  	"2004-08-12 16:15:27", "2004-08-11 21:38:24",
  	"2004-08-12 14:28:41", "2004-08-18 18:04:47",
  	"2004-08-13 15:23:14", "2004-08-14 02:36:33")
Time <- as.POSIXlt(Time)
x <- data.frame(main.name="AAA", fruit.name=rep(c("Apply","Watermelon"),each=5), 
		x.name=Time, y.name=(1:10))
plot(as.numeric(x$x.name),as.character(x$y.name),pch=26,)
fruit.class <- table(x$fruit.name)
color.code <- c(611,552,656,121,451,481,28,652,32,550,90,401,150,12,520,8)
for(j in 1:length(fruit.class))
{
	fruit <- names(fruit.class)[j]
	lines(smooth.spline(x[x$fruit.name==fruit, "x.name"],
		x[x$fruit.name==fruit, "y.name"],df=5),
		col=colors()[color.code[j]],lwd=5)
}

Best Regards!
Ivy Li
YMS in Production & Testing
Semiconductor Manufactory International(ShangHai) Corporation
#18 ZhangJiang Road, PuDong New Area, Shanghai, China
Tel: 021-5080-2000 *11754
Email: Ivy_Li at smics.com