As Gabor said, your zeit should be a POSIXct object, not a POSIXlt object. Then, for example:
zeit <- Sys.time() + 1500000*runif(10) val <- rnorm(10) plot(zeit,val,xaxt='n') axis.POSIXct(1,zeit, format='%Y-%m-%d %H:%M') Or better (perhaps) yet: plot(zeit,val,xaxt='n') axis.POSIXct(1,zeit, format='%Y-%m-%d\n%H:%M', mgp=c(3,2,0)) However, depending on the overall time range, this example might make more sense: zeit <- Sys.time() + 15000*runif(10) plot(zeit,val,xaxt='n') axis.POSIXct(1,zeit, format='%Y-%m-%d\n%H:%M', mgp=c(3,2,0)) > class(zeit) [1] "POSIXt" "POSIXct" -Don At 2:59 PM +0100 3/27/08, erkan yanar wrote: >Hello, > >Im reading Data out of a Database. >#v+ >rs <- dbGetQuery(con,"SELECT * ... ) >attach(rs) >#v- > >There ist a colum I convert into "Time". > >#v+ >> zeit<-strptime(datum,format="%Y-%m-%d %H:%M:%S"); >> class(zeit) >[1] "POSIXt" "POSIXlt" >#v- > >1. >A plot(zeit,money) plots the Data. >All i see on the x-achis are the Days. >I would like to see the hours also. > >2. >length(zeit) gives mit the length of one entry. >But zeit exists of 500 entries. >How can i get the amount of entries zeit got? > >3. >Im used to draw whith lines() into an existing plot. >But something like lines(zeit,food) wouldnt work. > >All this works quit well, when Im using unixtime. But seconds since >1970 are not that nice on the x-achis:-) > > > >Regards >Erkan Yanar > > > >-- >über den grenzen muß die freiheit wohl wolkenlos sein > >______________________________________________ >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. -- -------------------------------------- Don MacQueen Environmental Protection Department Lawrence Livermore National Laboratory Livermore, CA, USA 925-423-1062 ______________________________________________ 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.
