[R] Time on x-axis

[Gabor Grothendieck]

See:

library(zoo)
?read.zoo


On 2/24/06, Sangeetha Swaminathan <sangi at itc.utk.edu> wrote:
> Hello,
>
>   Thank you! It worked!! Now I have another query; I have about 300 data
> entries, and I dont think it would be possible to quote everything under
> tt<-c("") or x<-c(). Is there any way to plot the graph, without having to
> manually quote all the data items in the array?
>
> Thank you.
>
> Sangeetha
>
> >===== Original Message From "Gabor Grothendieck" <ggrothendieck at gmail.com>
> =====
> >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 at 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
> >>
> >> ______________________________________________
> >> R-help at 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
> >>
>
> -- 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
>
>