Wow!! Thank you so much for your suggestions! For now, A.K's suggestion #1 is perfect for me!
Thank you very much! Best, Charles On Thu, Oct 17, 2013 at 2:34 AM, William Dunlap <wdun...@tibco.com> wrote: > You could bump up the day each time an hour was less than the previous > one. E.g., > testtime <- > c("20:00:00","22:10:00","22:20:00","23:15:00","23:43:00","00:00:00","00:51:00","01:00:00") > var <- seq_along(testtime) # so you know what the plot should look like > # turn it ino a POSIXlt object so you can do arithmetic on it > t <- strptime(testtime,format="%H:%M:%S") > # now add a day each time t[i]<t[i-1] > td <- t + .difftime(cumsum(c(FALSE, diff(t)<0)), units="days") > # compare plots > par(mfrow=c(2,1)) > plot(t,var,type="b",xlab="Time",ylab="Var") > plot(td,var,type="b",xlab="Time",ylab="Var") > This is dicey because you may have skipped more than one day. > > Bill Dunlap > Spotfire, TIBCO Software > wdunlap tibco.com > > > > -----Original Message----- > > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] > On Behalf > > Of Law, Jason > > Sent: Wednesday, October 16, 2013 5:04 PM > > To: Charles Novaes de Santana; r-help@r-project.org > > Subject: Re: [R] Plot time series data irregularly hourly-spaced > > > > You just need the date, otherwise how would it know what time comes > first? In > > strptime(), a date is being assumed. > > > > Try this: > > > > testtime<- > > > c("20:00:00","22:10:00","22:20:00","23:15:00","23:43:00","00:00:00","00:51:00","01:00: > > 00") > > testday <- rep(Sys.Date() - c(1,0), times = c(5,3)) > > plot(as.POSIXct(paste(testday, testtime)), var) > > > > Jason > > > > -----Original Message----- > > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] > On Behalf > > Of Charles Novaes de Santana > > Sent: Wednesday, October 16, 2013 2:58 PM > > To: r-help@r-project.org > > Subject: [R] Plot time series data irregularly hourly-spaced > > > > Dear all, > > > > I have a time series of data that I would like to represent in a plot. > But I am facing some > > problems to do it because the time is represented in "hours", it can > start in one day and > > end in another day, and it is not regularly spaced. > > > > My problem is that when I plot my data, my X-axis always starts from the > lower values of > > my time data. For example, I would like to plot data that starts at > 20:00:00 and ends at > > 01:00:00, but R considers that 01:00:00 is lower than 21:00:00 and my > plot is kind of > > "crossed over time". > > > > Please try this example to see it graphically: > > > > testtime<- > > > c("20:00:00","22:10:00","22:20:00","23:15:00","23:43:00","00:00:00","00:51:00","01:00: > > 00") > > var<-runif(length(testtime),0,1) > > > plot(strptime(testtime,format="%H:%M:%S"),var,type="b",xlab="Time",ylab="Var") > > > > In this case, I would like to have a plot that starts at 20:00:00 and > ends at 01:00:00. > > > > Does anybody know how to make R understand that 00:00:00 comes after > 20:00:00 in > > this case? Or at least does anybody know a tip to make a plot with this > kind of X-axis? > > > > Thanks for your time and thanks in advance for any help. > > > > Best regards, > > > > Charles > > -- > > Um axé! :) > > > > -- > > Charles Novaes de Santana, PhD > > http://www.imedea.uib-csic.es/~charles > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@r-project.org mailing list > > 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. > -- Um axé! :) -- Charles Novaes de Santana, PhD http://www.imedea.uib-csic.es/~charles [[alternative HTML version deleted]]
______________________________________________ R-help@r-project.org mailing list 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.