Hello Ivy, Your scale shows times in seconds since 1970 (I guess it is 1970)
usually, I don't draw the axis with plot (see xaxt="n"), but call axis aftewards, giving the ticks positions and the labels as strings, using format.
With your example:
format(Time,'%d %b %Y') [1] "05 Aug 2004" "13 Aug 2004" "14 Aug 2004" "12 Aug 2004" "12 Aug 2004" [6] "11 Aug 2004" "12 Aug 2004" "18 Aug 2004" "13 Aug 2004" "14 Aug 2004"
Cheers,
Marc
On Mon, 18 Oct 2004 14:26:51 +0800, Ivy_Li <[EMAIL PROTECTED]> wrote:
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 LiÄÂÄÂÃÂÃÂÃÂÄÂÂÄÂÄÂ YMS in Production & Testing Semiconductor Manufactory International(ShangHai) Corporation #18 ZhangJiang Road, PuDong New Area, Shanghai, China Tel: 021-5080-2000 *11754 Email: [EMAIL PROTECTED]
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