similar to: Manipulating dates

The interface for dates in R is a little confusing to me. I want to create a vector of Date objects from vectors of years, months, and days. One solution I found is: years <- c(1991, 1992) months <- c(1, 10) days <- c(1, 2) dates <- as.Date(ISOdate(years, months, days)) But, in this solution the ISOdate function converts the vectors into characters, which can cause serious

I have been trying to download the latest version to my Macbook X version 10.6.8 from my institutions mirror http://cran.cnr.Berkeley.edu Usually is only takes minutes, but regardless of the browser or where I connect to the internet I have been unable to download because it would take upwards 2 days according to the download dialogue box. I'd really like to get the newest version to run some

Dear list, I would like to create a time series plot in which the paths of several individuals are stacked above each other, with the x-axis being the total observation period of three years ( 1.1.2004 to 31.12.2007) and the y-axis being some defined range[min,max]. My data consist of Date/Time information and the paths of 45 individual as the distance from the location of release. An example

what package should I include to use timeDate? I want to convert a double (num of millis) into date object.

Hello. I am having the worst time converting x-axis date ticks to real dates. I have tried several suggestions in online help tips and books to no avail. For example, the x-axis has 0, 50, 100, etc, and I want it to have "6/17/03", "8/6/03" etc. See attached (sample). Can anybody help me with this. Here's my code: ts.plot(date.attackmode.table[,1],

Using strptime() and other functions for dates has been very helpful with the kind of data I often work with. However, I haven't found out how time as such should be specified. All my attempts result in time *and* date: >treatment_time<-c("01:02:03","02:03:04") # hours:minutes:seconds >time.2<-strptime(treatment_time,format="%H:%M:%S") >time.2 [1]

Hi All, I am counting the number of occurrences of the terms listed in one vector in another vector. My code runs: for( i in 1:length(vector3)){ vector3[i] = sum(1*is.element(vector2, vector1[i])) } where vector1 = vector containing the terms whose occurrences I want to count vector2 = made up of a number of repetitions of all the elements of vector1 vector3 = a vector of NAs that is

Hillary, Richard M wrote: > Morning chaps, I have a little question for your capable minds... Say > I have an observed and predicted set of quants (in my case, length > frequencies by year and age/length), is there a way to use lattice > plots to plot the observed and predicted data together, panel by panel? > Obrigado/gracias (thankyou in Galego is?...) > Rich Hi Richard, If

Hillary, Richard M wrote: > Morning chaps, I have a little question for your capable minds... Say > I have an observed and predicted set of quants (in my case, length > frequencies by year and age/length), is there a way to use lattice > plots to plot the observed and predicted data together, panel by panel? > Obrigado/gracias (thankyou in Galego is?...) > Rich Hi Richard, If

Hi- I'm trying to make my PCA (princomp) colored. In my csv excel sheet, I have the first column numbered according to the groupings I want to assign to the PCA. I've played around with trying to set this first column as the color vector, but haven't had any luck. Any suggestions? Thanks, Hillary [[alternative HTML version deleted]]

Hi everyone, I have another fairly simple question. I want to take the earliest of two dates from these two date columns. I've tried converting the dates to numbers and just get a vector full of NA's. I've also tried using the chron function to compare the two and have been unsuccessful. I then tried to use:temp.2 <- as.POSIXct(strptime(temp, '%d/%m/%Y')) where temp is

On Mon, December 19, 2016 12:41 am, Sorin Srbu wrote: >> -----Original Message----- >> From: CentOS [mailto:centos-bounces at centos.org] On Behalf Of >> geo.inbox.ignored >> Sent: den 16 december 2016 15:03 >> To: centos at centos.org >> Subject: Re: [CentOS] OT: Blank mails from this list >> >> >> >> On 12/16/2016 07:29 AM, Valeri

I have times and would like to round down to the earliest 30 minute increment. For instance, a time of 2011-04-28 09:02:00 (the as.numeric value = 1303999320) I would like it to be rounded down to: 2011-04-28 09:00:00 (the as.numeric value = 1303999200) Any ideas of how to do this? ----- In theory, practice and theory are the same. In practice, they are not - Albert Einstein -- View this

hi, all: Just wonder if there is any suggestions in how to get around this cbind error. I created two character lists with identical length. First tried combine the lists together with cbind, then convert the lists to matrix, and tried again. Both faied. Any fix to merge the two lists/matrices? ll<- multiget(ftID, hgu95av2LOCUSID) > class(ll) [1] "list" > sym <-

Dear all, I've been struggling to perform common operations on dates that I need to be able to correct draw date-time scales - in particular I need to be able to round/truncate/ceiling dates to arbitrary precision - e.g. to weeks, months or years (or multiples thereof). I haven't been able to find anything to do this in base R (trunc.Date only truncates to sub-day units), or in the date

Hi all, I have problems with years of dates using "chron" package. I don't understand why R by this istruction: > dates("01/02/29",out.format="d/m/year") [1] 02/Jan/2029 > dates("01/02/30",out.format="d/m/year") [1] 02/Jan/1930 reads "29" as 2029 and "30" as 1930. How could I change to read "00" to

Hello, I am trying to use HMisc describe on a data frame. I have specified certain variables as dates using, for example: df1$aidsdate <- dates(aidsdate,format="day.mon.year", origin=c(month = 1, day = 1, year = 1960)) When I use describe on the dataframe I get this error: Error in Ops.dates(weights, x) : * not defined for chron objects Has anyone had this problem? I had

I built R 2.2.0 from source on my debian machine yesterday and updated all packages. My problem is that "dates" function from its, that my code heavely uses is now masked by "dates" from chron. How can I specify tehat I want to use dates from its or how can I prevent it from being masked? > library(its) Loading required package: Hmisc Hmisc library by Frank E Harrell Jr

I have some questions and comments on timezones. Problem 1. # get current time in current time zone > (now <- Sys.time()) [1] "2003-07-29 18:23:58 Eastern Daylight Time" # convert this to GMT > (now.gmt <- as.POSIXlt(now,tz="GMT")) [1] "2003-07-29 22:23:58 GMT" # take difference > now-now.gmt Time difference of -5 hours Note that the difference

I think this is the fourth attempt to send this blessed message, so let's hope this gets through without any 'unprocessed' or 'ignored' in-lines on auto-reply. I wish to report to you some strange problems I'm experiencing with installing packages directly into my -R- 2.15.1 (there is an indirect solution, which I note below). First, here's some essential information: