similar to: aggregate slow with variables of type 'dates' - how to solve

Dear all, I have a sample with 920 observations. I want to create a loop which takes 300 of these observations for the prediction and the rest to estimate the model. My idea was to create something like this: cs.training.dat <- read.table... cs.training.dat_sub1 <- subset(cs.training.dat, Income>10) cs.training.dat_sub2 <- subset(cs.training.dat_sub1, Dept.Ratio<=1)

Dear All, I am trying to convert some S-plus code that I have to run MCMC into R-code. The program works in S-plus, but runs slowly. I have managed to source the program into R. R recognizes that the program is there; for example, it will display the code when I type the function name at the prompt. However, the program will not run. When I try to run the program, I get the following error

hello all i searched the archives and couldn't get a solution to the following question. i have the following function: F=function(z,v) { if (v==-.5) return(1) else return(2*v/z + 1/Recall(z,v-1)) } and while testing whether it works (ie F(z,v) is approx = besselK(z,1+v)/besselK(z,V). the recursion formula allows one to calculate besselK(z,1+v)/besselK(z,V) for large values of z )

Running R 2.13.1 on Windows XP. I would like to get week of the year (1-52) for each date. library(chron) dts <- dates(c("02/27/92", "02/27/92", "01/14/92","02/28/92", "02/01/92")) dts dts.chron <- as.chron(dts) dts.chron class(dts.chron) # all of these component extractions work: months(dts.chron) weekdays(dts.chron) years(dts.chron)

Hi, I am using aggregate() to add up groups of data according to year and month. It seems that the function aggregate() automatically sorts the levels of factors of the grouping elements, even if the order of the levels of factors is supplied. I am wondering if this is a bug, or if I missed something important. Below is an example that shows what I mean. Does anyone know if this is just the way

> tbs<-dbListTables(con) > > tbs [1] "lowend" "time" "week30" "week33" "week39" "week42" > my.data.copy <- dbReadTable(tbs, "week42") Error in function (classes, fdef, mtable) : unable to find an inherited method for function "dbReadTable", for signature "character",

Hello All: I am trying to generate a sequence of dates using library(chron). Using the following code, I got most of what I want, dts <- seq.dates("01/02/1998", "01/10/2001", by="day") dts <- dts[!is.weekend(dts)] a sequence of weekdays only (no weekend dates), with first observation appearing as 01/02/98 and the last 01/10/01. But I would

Hello, today I've updated on the newest R-Version. But sadly a function I needed didnt want to work: The input is e.g. days(as.Date("21-07-2005","%d-%m-%y")) the error is: Fehler in Math.Date(dts): floor nicht definiert f??r Date Objekte (Error in Math.Date(dts): floor not defined for date objects) Same for year. Only months gives me the correct output. In Version

Does anyone know if Windows XP Pro (Service Pack 2) will have difficulty using a Samba share that is larger than 2 TB? Windows seems to be able to read and write from a share that is larger than 2 TB -- for instance, Windows will tell me that a share is 4 TBs in size, and if I have 1.5 TBs stored on it, it will tell me that 2.5 TB are free. But as soon as 2 TB of data have been written

Hello dear useRs and wizaRds, I encountered the following problem using the hist() method for the 'times' classes from package 'chron'. You should be able to recreate it using the code: library(chron) # pasted from chron help file (?chron) dts <- dates(c("02/27/92", "02/27/92", "01/14/92", "02/28/92", "02/01/92")) class(dts)

Hi I'm encountering an error with some of my Windows clients when using CTDB and samba to access a GPFS hosted share. We see the following error all the time. [2011/03/14 12:31:16.549084, 1] modules/vfs_gpfs.c:1099(vfs_gpfs_ntimes) vfs_gpfs_ntimes: set GPFS ntimes failed -1 The copy continues but is slow. All the timestamps seem reasonable for the data copied. The GPFS

Dear Listers, I have encountered a strange problem using diff() and POSIXt: dts<-c("15/4/2003","15/7/2003","15/10/2003","15/04/2004","15/07/2004","15/10/2004","15/4/2005","15/07/2005","15/10/2005","15/4/2006") dts <- strptime(dts, "%d/%m/%Y") class(dts) [1] "POSIXt"

Dear Listers, I have encountered a strange problem using diff() and POSIXt: dts<-c("15/4/2003","15/7/2003","15/10/2003","15/04/2004","15/07/2004","15/10/2004","15/4/2005","15/07/2005","15/10/2005","15/4/2006") dts <- strptime(dts, "%d/%m/%Y") class(dts) [1] "POSIXt"

Hi, I am trying to count weekday of the month using R. For example, 1/4/2001 is the 4th weekday of Jan, and 1/5/2001 is the 5th weekday of the month, and 1/8/2001 is the 6th weekday of the month, etc. I get as far as extracting the weekdays from a sequence of dates (see below). But I have not yet figured out a fast way of counting without using a For Loop. Does anyone know how to do such counting

Given that the xenvm machine is based on vexpress but with an extremely limited selection of peripherals (the guest is supposed to use virtual devices instead), add "xen,xenvm" to the list of compatible machines in mach-vexpress. Changes in v2: - remove include skeleton; - use #address-cells = <2> and #size-cells = <2>; - remove the debug bootargs; - use memory@80000000

Hi, recently we (oVirt) have started discussing whether the way virt-v2v handles import from OVA files is good. And I would be interested in ideas how it can be improved. It is likely somebody already gave some thought to this problem. TL;DR: Extracting the OVA before import is a problem for large VMs (in sizes of TBs). Can we change something to prevent the extraction and work directly over

Playing a bit with todays linux-next on my jetson, it seems this patch is still required for enabling the GPU. Is there anything blocking it (firmware not available yet in liux-firmware?) On Mon, May 19, 2014 at 06:24:10PM +0900, Alexandre Courbot wrote: > Signed-off-by: Alexandre Courbot <acourbot at nvidia.com> > --- > arch/arm/boot/dts/tegra124-jetson-tk1.dts | 8 +++++++- >

I have been struggling with getting a member server to join my domain. Thanks to testing and using a VM, I can get the test member server to join my domain. The member server on "real hardware" cannot join, well sort of. When I "join", I get: net ads join -U Administrator Enter Administrator's password: Using short domain name -- DTS***M Joined 'DTMBR01' to dns

Newbie question (just joined the list) Is anyone running Ruby on Rails in a teaching environment? Regards John John Colby BA, MBCS, PGCertE Lecturer, Department of Computing, The Business School Room F316, Galton Building, University of Central England, Franchise Street, Perry Barr, Birmingham B42 2SU Tel: +44 (0) 121 331 6937, Fax +44 (0) 121 331 6281, Mobile: 07795 215 912

note: whole function is below- I am sure I am doing something silly. when I use it like USGS(input="precipitation") it is choking on the precip.1 <- subset(DF, precipitation!="NA") b <- ddply(precip.1$precipitation, .(precip.1$gauge_name), cumsum) DF.precip <- precip.1 DF.precip$precipitation <- b$.data part, but runs fine outside of the function: days=7