[R] Time on x-axis

[Gabor Grothendieck]

And also, read 1. R News 4/1 help desk article on dates and times,
2. the zoo vignette:

library(zoo)
vignette("zoo")

and 3. re-read the Introduction to R manual:
   http://cran.r-project.org/doc/manuals/R-intro.pdf


On 2/24/06, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:
> 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
> >
> >
>