I think that you problem is that your format statement should be "%m/%d/%Y %H:%M"; notice the capital 'y' for a 4 digit year. You were probably getting NAs for dates.
Here is what I got after reading in your partial data: > x <- read.csv('clipboard', as.is=T, header=F) > x V1 V2 V3 1 3/11/2006 15:09 0.014652 2 3/11/2006 15:08 0.014652 3 3/11/2006 15:06 0.000000 > x.date <- strptime(paste(x$V1, x$V2), format="%m/%d/%Y %H:%M") > x.date # make sure the dates look correct [1] "2006-03-11 15:09:00" "2006-03-11 15:08:00" "2006-03-11 15:06:00" > plot(x.date, x$V3) > On 3/11/06, Richard Evans <[EMAIL PROTECTED]> wrote: > > Hello r-experts, > I sure could us a little help. > > I have an ever updating text file with timestamped data in it. I can > reformat in anyway I want if need be but currently I have chosen to make > columns of date, time and measuresed value (comma delimeted and with the > dates and times in quotes to interpret them as strings). > > Here is a small section of my text data file: > > "3/11/2006","15:09",0.014652 > "3/11/2006","15:08",0.014652 > "3/11/2006","15:06",0.000000 > ...etc... > > I am trying to make a plot of 'X' vs. 't' > where 'x' is a simple numerical vector of N elemets > and 't' is a timestamp like "mm/dd/yyyy hh:mm:ss" > (also of N elements) > > here is how i am getting the data: > > > >TheData <- scan("MyDataFile.txt",sep=",",list("","",0)) > >TheDates <- TheData[[1]] > >TheTimes <- TheData[[2]] > >TheValue <- TheData[[3]] > > > and here is how i am making the datetime objects: > > > >TimeStampStr <- paste(TheDates,TheTimes) > >TimeStampObj <- strptime(xStamp,"%m/%d/%y %H:%M:%S") > > > and then i try to plot it with: > > > >plot(TimeStampObj,TheValues) > > > but this is where i get an error like this: > > > Read 54 records > Error in plot.window(xlim, ylim, log, asp, ...) : > need finite 'ylim' values > In addition: Warning messages: > 1: no finite arguments to min; returning Inf > 2: no finite arguments to max; returning -Inf > > Can someone help me understand what i need to do? > Am I going about this the wrong way? > Is there a smarter/more elegant way to do this? > > And advice is greatly apreciated. > > Sincerest thanks (in advance), > - revansx > > P.S. > here is an small section of my input file: > > ______________________________________________ > 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 > -- Jim Holtman Cincinnati, OH +1 513 646 9390 (Cell) +1 513 247 0281 (Home) What the problem you are trying to solve? [[alternative HTML version deleted]] ______________________________________________ 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