Re: [R] Time on x-axis

From: Gabor Grothendieck <ggrothendieck_at_gmail.com>
Date: Tue 21 Feb 2006 - 03:59:17 EST

Try this:

# test data
tt <- c("23:05:02", "23:10:02", "23:15:03", "23:20:03", "23:25:03", "23:30:03", "23:35:03", "23:40:03", "23:45:04", "23:50:04", "23:55:03", "23:55:03")
x <- c(0.575764, 0.738379, 0.567414, 0.663436, 0.599834, 0.679571, 0.88141, 0.868848, 0.969271, 0.878968, 0.990972, 0.990972)

library(zoo)
library(chron)
z <- zoo(x, times(tt))
plot(z)

Read the R Help Desk article in R News 4/1 about dates and times and also read the chron article in its references.

Also read the zoo vignette which you can access like this:

library(zoo)
vignette("zoo")

and also read ?axis in case you want to customize the axes.

On 2/20/06, Sangeetha Swaminathan <sangi@itc.utk.edu> wrote:
> Hello,
>
> I just started using the GNU R. I am having trouble plotting my data. I am
> tryin to plot the following data:
>
> TIMESTAMP LOGIN-TIME
> (hh:mm:ss) (s)
>
> 23:55:03 0.990972
> 23:55:03 0.990972
> 23:50:04 0.878968
> 23:45:04 0.969271
> 23:40:03 0.868848
> 23:35:03 0.88141
> 23:30:03 0.679571
> 23:25:03 0.599834
> 23:20:03 0.663436
> 23:15:03 0.567414
> 23:10:02 0.738379
> 23:05:02 0.575764
>
> with TIMESTAMP on the x-axis. The plot() function assumes the x-axis as the

> total number of events, and plots the desired graph. But I want the TIMESTAMP
> on the x-axis. If I try to change the x-axis, the y-axis gets modified too,
> and all I get is just a "dot" as a plot.
> Can someone tell me how I can make R plot my graph, with TIMESTAMP as my
> x-axis and LOGIN_TIME as my y-axis?
>
> Thank you.
>
> Sangeetha
>
> -- Sangeetha Swaminathan
> Graduate Assistant
> Innovative Technology Center (ITC)
> 2444 Dunford Hall
> The University of Tennessee
> Knoxville, TN 37996
> Phone [O]:(865) 974-9672
> [R]:(865) 946-4340
>
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R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Tue Feb 21 04:03:00 2006

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