Hello,
the time are in the first table like that : 10:24:00
and i use this for
listeMesuresPropres$Heure. <- hms(listeMesuresPropres$Heure.
after time ar like that : 10H 24M 0S
and when i use with ggplot
scale_x_time(breaks = "20 secs",labels = "%H:%M:%S")
it have the graphics but noting write on the X axis.
I think it a problem with the format of the time, because if i try a ggplot
without scale_x_time i don't have anything on the graphic.
Thank's
François-Marie BILLARD
On Fri, 12 Feb 2021 18:24:35 +0000
Rui Barradas <ruipbarra...@sapo.pt> wrote:
> Hello,
>
> In order to select every 20 s, set the date_breaks = "20 secs", not the
> breaks.
> The axis labels are also formatted, with date_labels, standard datetime
> format strings are used for this. And rotated, not part of the question.
>
> # Create some data
> set.seed(2021)
> time <- seq(as.POSIXct("2021-02-11"), as.POSIXct("2021-02-11 00:29:59"),
> by = "1 secs")
> y <- cumsum(rnorm(length(time)))
> df1 <- data.frame(time, y)
>
> # Plot the data
> library(ggplot2)
>
> ggplot(df1, aes(time, y)) +
> geom_line() +
> scale_x_datetime(date_breaks = "20 secs", date_labels = "%M:%S") +
> theme(axis.text.x = element_text(angle = 90, vjust = 0.5, hjust=1,
> size = 5))
>
>
> Hope this helps,
>
> Rui Barradas
>
> Às 15:05 de 12/02/21, Informatique escreveu:
> > Hello,
> >
> > i'm using Rstudio from a few day, and i have some information in a CVS
> > file, take every five second, format of the time is HH:MM:SS.
> > I use the hour on the X axis, but i don't want having all the time print.
> > For example only every 10 values.
> >
> > I think it will be possible with scale_x_datetime(breaks =
> > date_breaks(XXX)
> >
> > but i don't understand how select every 20 s.
> >
> > Thank's for your help
> >
> > François-marie BILLARD
> >
--
Informatique <informati...@billard-francois-marie.eu>
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
