similar to: POSIXct bug for conversion of specific combinations of date and time

Hello, Suppose we need a function that takes a POSIXct object and need to calculate the time difference between it and GMT time: gmtDiff <- function(time) { time.gmt <- as.POSIXct(format(time, tz="GMT")) time.plt <- as.POSIXlt(time) dlstime <- ifelse(time.plt$isdst > 0, 1, 0) timezone <- as.numeric(difftime(time, time.gmt, units="hours"))

Hi, I would like to print elements from sem (structural equation modeling) function (e.g., model-reproduced covariance matrix (C); estimated asymptotic covariance matrix of parameter estimates (cov)). How can I do this? Thanks, Andr?? -- Andr?? Tavares Corr??a Dias Laborat??rio de Ecologia Vegetal Universidade Federal do Rio de Janeiro CCS-IB-Departamento de Ecologia Caixa Postal 68020

What am I missing? When I run the code below I get the error message "Error: ggplot2 doesn't know how to deal with data of class function" Googling suggests a message of "Error: ggplot2 doesn't know how to deal with data of class XXX" is not uncommon but I don't see why I am getting a "function" error unless I am using some reserved word?

Hi, Using the following simple character vector representing a time series with fractional seconds: datetime <- c("20/09/2011 13:00:59.00", "20/09/2011 13:00:59.02", "20/09/2011 13:00:59.04") Conversion to POSIXct runs into problems; the second element is not interpreted correctly: ---<--------------------cut

Hi, I'm getting a segmentation fault as follows: ---<--------------------cut here---------------start------------------->--- R> begt <- as.POSIXct(strptime("10/01/2009 06:00:00", format="%d/%m/%Y %H:%M:%S"), + tz="GMT") R> tser <- seq(begt, by=5, length.out=91000) R> tser.trunc <- format(tser) Error: segfault from C

lo que necesito es "98989","121212" y no : paste(unlist(strsplit(char,",")),collapse=",") [1] "98989,121212" Luis -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- Luis Ridao Cruz Faroe Marine Research Institute Nóatún 1, P.O. Box 3051 FO-110 Tórshavn Faroe Islands Tel : (+298) 353900 Fax: : (+298) 353901 e-mail: luisr@hav.fo

esto me convierte la cadena de caracteres en dos y eso no es lo que quiero además el resultado final de la cadena debe ser: "98989","121212" Luis -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- Luis Ridao Cruz Faroe Marine Research Institute Nóatún 1, P.O. Box 3051 FO-110 Tórshavn Faroe Islands Tel : (+298) 353900 Fax: : (+298) 353901 e-mail: luisr@hav.fo

Hello, This is my first post in this e-mail list and I hope it's enough to justify calling for help. In case it's not, sorry. I'm trying to do analysis and graphics using a factor as a criteria to split data and do the analysis/graphics for each subset of data. Right now what I'm trying to do is to fit and plot the following logistic model, according to a third variable named

Dears I am searching information about how to use raw data, when it is used, didn't find to much information on R help. Any suggestion on links about this theme? atte -- Luis Iván Ortiz Valencia Doutorando Saúde Pública - Epidemiologia, IESC, UFRJ Estatístico Msc. Spatial Analyst Msc. [[alternative HTML version deleted]]

I realize it's -12C and we're having the next best thing to a blizzard but why can I not melt this data frame. I am missing something terribly obvious but I just don't understand what the error message is saying. John Kane Kingston ON Canada Code and aata below #================================================# library(reshape2) melt(mydata, id.vars = c("date"))

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Dear list, I have found an unusual behavior and would like to check if it is a possible bug, and if updating R would fix it. I am not sure if should post it in this mail list but I don't where is R bug tracker. The only mention I found that might relate to this is "If times is a computed quantity it is prudent to add a small fuzz." in rep() help, but not sure if it is related to

Hello, I'm willing to plot a sequence of densities on a 3d graph, something like ----------------------------------------------------------------- x <- sapply(1:10, function(i)rnorm(1000)) f <- sapply(1:10, function(i)density(x[,i], from=-5,to=5)$y) grid <- density(x[,1], from=-5,to=5)$x win.graph() persp(grid1, 1:10, f,theta=-50, phi=30, d=2)

Hi! I have to import some TXT files into R, but the separation between the columns are made with different blank spaces, but each file use the same separation. Example: 31 104 5 0 11RUA SAO SEBASTIAO 25 BAIRRO FILETO 01

Hello R-users I am getting error messagens when I require some packages or execute some procedures, like these below: > require(tseries) Loading required package: tseries Error in get(Info[i, 1], envir = env) : cannot allocate memory block of size 2.7 Gb > require (TSA) Loading required package: TSA Loading required package: locfit Error in get(Info[i, 1], envir = env) : cannot

hello all I am trying to learn how to use the RGtk2 package... so, my first problem is: I don't get the right way for populate my gtkListStore object! any help is welcome... because I am trying several day to mount the code... Thanks in advanced Cleber N. Borges --------------------------- # my testing code library(RGtk2) win <- gtkWindowNew() datamodel <-

Hi, I tried to use MethComp library and this library make use of the WinBUGS by R2WinBuGUS, but I get the follow error in bugs.run: *Error in bugs.run(n.burnin, bugs.directory, WINE = WINE, useWINE = useWINE, : * Look at the log file and try again with 'debug=TRUE' to figure out what went wrong within Bugs. Anyone can help-me, please? Thanks Cleber library( MethComp ) library(

Hello, I've googled for a while and couldn't find anything on this topic: say I have a matrix A and want to build matrices B1, B2,... using blocks from A (or equivalently an array B with B[,,i] being a block from A), and that I must sum the B[,,i]'s. I've come up with this rather non-elegant code: > n = 6 > p = 3 > > A <- matrix(1:(n^2), n, n, byrow=TRUE) >

Hello all, I'm trying to use the adimpro package to read RAW files (image). Make readins is OK! > r <- read.raw( '20171218_210956.dng', type='RAW', compress=FALSE ) > summary( r ) > ### cut the many lines... Filter pattern: GR/BG > extract.info( r ) [1] "GR/B" > To next, develop the raw file using the "develop.raw" function. But the

Hii rstudio members I am learning rstudio, For my manuscript I am trying to plot CCA using species and environmental data. But I am getting error like Error in cca.default(sptrans, envtrans) : all row sums must be >0 in the community data matrix *My code is like * library(vegan) library(ggplot2) library(dplyr) rassspec<-read.csv("C:/Users/hp/Desktop/R_data/rassspec.csv",