[R] plot x-axis DateTime NOT evenly spaced

[arun]

Hi,
Try this:
dat1<-read.table(text="1 2012-07-01 00:57:54 +0900    156
2 2012-07-01 01:07:41 +0900    587
3 2012-07-01 01:09:31 +0900    110
4 2012-07-01 01:18:42 +0900    551
5 2012-07-01 01:39:01 +0900    1219
6 2012-07-01 01:40:40 +0900      99",sep="",header=FALSE,stringsAsFactors=FALSE)

dat2<-data.frame(date=paste(dat1[,2],dat1[,3],paste0("+",dat1[,4]),sep=" "),Interval=dat1[,5])
dat2$date<-as.POSIXct(dat2$date,"%Y-%m-%d %H:%M:%S")
library(xts)
 dat3<-xts(dat2[,-1],order.by=dat2[,1])
plot(dat3)
A.K.




----- Original Message -----
From: ishi soichi <soichi777 at gmail.com>
To: r-help <r-help at r-project.org>
Cc: 
Sent: Monday, January 7, 2013 3:55 AM
Subject: [R] plot x-axis DateTime NOT evenly spaced

R-64 latest

Hi. I am trying to plot a set of csv data, which looks like

> head(interval)
                       date inteval
1 2012-07-01 00:57:54 +0900     156
2 2012-07-01 01:07:41 +0900     587
3 2012-07-01 01:09:31 +0900     110
4 2012-07-01 01:18:42 +0900     551
5 2012-07-01 01:39:01 +0900    1219
6 2012-07-01 01:40:40 +0900      99

as you can see, more than one event happens each day, and they are not
evenly spaced.  Obviously hours, minutes and seconds are important for the
plot.

I tried

interval$date <- as.Date(interval$date, "%Y-%m-%d %H:%M:%S +0900")

but this chops the time off.

Could anyone show me how to plot data with x values as Date(or Time)
objects?

soichi

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