similar to: Changing the day of the month in a date

I have a vector of dates. I wish to find the month end date for each. Any suggestions? e.g. For 12/15/05, I want 12/31/05, For 10/15/1995, I want 10/31/1995, etc __________________________________________________ [[alternative HTML version deleted]]

Hello I am trying to import the attached file Curva LIBOR to R. I am trying to use the following commands and obtaining the following errors > res <- read.xlsx("C:\\Users\\FELIPE PARRA\\Documents\\Quantil\\Federacion\\Curva LIBOR.xlsx", 4) Error en .jcall(rowCells[[ic]], "I", "getColumnIndex") : RcallMethod: invalid object parameter > res <-

Hello all, I have been working with b-splines and noted that the splines package is not available in CRAN. Does any body know what happened with it? Or, is there any package that replaces it? Thank you Felipe Parra [[alternative HTML version deleted]]

Hello I am new to RExcel and I would like to run a source code form the excel worksheet. I would like to run the following code source("C:\\Quantil Aplicativos\\Genercauca\\BackwardSelectionNC.r") from the excel wroksheet. Does anybody know how to do this? Thank you Felipe Parra [[alternative HTML version deleted]]

Hello I want to unlist the attached element getting only the first element in each element of the list. The last element of the list looks as this: [[5065]] [[5065]]$Pluv3Meses [1] 274.4 [[5065]]$PluvMesesMedio [1] 378.2667 [[5065]]$Pluv2UltimosMeses [1] 23.33333 So I would like to get for each element of the list the element called Pluv3Meses. The whole list has 5065 elements but when I try to

Hello, I have stings which have all sort of characters (numbers, letters, punctuation marks, etc) I would like to stay only with the numbers in them, does somebody know how to do this? Thank you Felipe Parra [[alternative HTML version deleted]]

Hello, does somebody know in a boxplot, what does each element in the boxplot represent? 1. lines at the extremes of the dotted lines? 2. Extremes of the boxes 3. Black line in the middle of the box? 4. notches? Thank you Felipe Parra [[alternative HTML version deleted]]

Dear all, I have a question related to the POSIXlt function in R. I have a set of dates and times, for exmaple: startx <- as.POSIXct("2011-01-01 00:00:00") finx <- as.POSIXct("2011-12-31 00:00:00") daysx<- seq(startx, finx, by="24 hours") I want to change the dates of all the days falling on a Saturday to the next working day (i.e. Monday). So I

Hello, I am runnning a program on R with a "big" number of simulations and I am getting the following error: Error: no se puede ubicar un vector de tamaño 443.3 Mb I don't understand why because when I check the memory status in my pc I get the following: > memory.size() [1] 676.3 > memory.size(T) [1] 1124.69 > memory.limit() [1] 4000 which should in theory allow to

Dear R experts, I have a problem in modifying one column of a dataframe with a datatime format using a datetime operator. Here is my dataframe A: DATACONT PROVINCIA VALORE 1 2007-12-31 MI 1 2 2007-12-31 PV 2 3 2007-12-31 NA 3 4 2007-12-31 MI 4 5 2007-12-31 RM 5 6 2007-12-31 RM 6 7 2007-12-31 MI 7 8

Dear R Help, I am trying to get fields showing the last day of each month for a monthly closing project. In order to find the last day of the previous month, I subtract the number of days from the current month. For all months my code works; however, for October, my code doesn't work...it returns 2010-09-*29* instead of 2010-09-*30*. format(strptime("2010-10-31",

I have a vector that contains month and year in the format YYYYMM (e.g.“200701”, “200702”) I wish to do to things: 1. I need to convert to a date that is the last calendar day of each month. 2. I need to convert this to a date that is the last U.S. stock-exchange trading day of each month. Any advice is appreciated, mymonths <- c(200701, 200702)

Hello, i have the following list strsplit(as.character(Elecciones$Municipios),"\\.") [[1]] [1] "ANTIOQUIA" "ABEJORRAL" [[2]] [1] "META" "ACACIAS" [[3]] [1] "CASANARE" "AGUAZUL" [[4]] and I would like to make a vector of the first element of each of the list items, in this case ANTIOQUIA, META, CASANARE, etc . Do you know how

HI, R-Users: I got a questions. have been struggling so long time.... I have this data: > m1$Year_Month 201009 201010 201011 201101 201102 > min(m1$Year_Month) 201009 I want to calculate the following two answers, how do I program it? > difference in Month????? [1] 0 1 2 4 5 >difference in Days????? 0 31 61 .... Thank you in advance!!! Tammy [[alternative

Hello to all, I have been using an optim with the following call: optim(param_ini,fun_errores2,Precio_mercado=Precio,anos_pagosE2=anos_pagos,control=list(maxit=10000,reltol=1e-16)) depending on the intial values I'm getting the same solution but once I get the convergence message=10 (no convergence) and for the others I get convergence message = 0 Solution1: $par beta1

Hello. I would like to know if there exists in R a function like trunc but where i can choose how many decimal places can I stay with in the number I have (sort of the same as the trunc function in excel). I would like, for example if I have the number 0.974678 and I choose to stay with 3 decimal places to have as ouput 0.974. Thank you Felipe Parra [[alternative HTML version deleted]]

Hi list, I'm trying to turn a date into something productive. (Not what you may be thinking....) I want three functions so I could take a "date" object and get the day of week, month, and year from it. xx <- as.Date("2006-01-05") month(xx) equal 1 day(xx) equal 5 year(xx) equal 2006 I'm aware of the weekdays() and months() functions in the base package. But

Is there any R function to calculate automatically the last day of a particular month? For example "sep2009" should be converted to last day of September of 2009? Thanks -- View this message in context: http://www.nabble.com/How-to-get-last-day-of-a-month--tp25425645p25425645.html Sent from the R help mailing list archive at Nabble.com.

Hello. I am trying to use the portfolio backtesting function in fPortfolio package, but I don't now why in my version of fPortfolio I don't have either the portfolioBactest nor the portfolioBacktesting functions. Does anybody knows what might be going on? thank you Felipe Parra [[alternative HTML version deleted]]

Hello I am trying to use predict.lm, but I am having trouble getting out of sample predictions. I am getting the same output if I use the following three commands: predict(ModeloLineal,predictors[721:768,]) predict(ModeloLineal,predictors[1:768,]) predict(ModeloLineal) where ModeloLineal is the output from ModeloLineal<-lm(dataTS[,6] ~ predictors[1:720,]), so the first 720 observations of