similar to: mc.cores and computer settings on osx and linux

dear R readers---I thought I would post the following snippet of R code that makes by() like operations easier and faster on multicore machines for R novices and amateurs. I hope it helps some. YMMV. feel free to ignore. PS: I wish R had a POD-like documentation system for end users that are not writing full libraries. because it does not, I did not provide documentation ala '?mc.by'.

Dear R wizards--- I have a wrapper on mclapply() that makes it a little easier for me to do multiprocessing. (Posting this may make life easier for other googlers.) I pass a data frame, a vector that tells me what rows should be recomputed, and the function; and I get back a vector or matrix of answers. d <- data.frame( id=1:6, val=11:16 ) loc <- c(TRUE,TRUE,FALSE,TRUE,FALSE,TRUE)

Dear R-Help group: I have been tinkering with how I want my personal standard library functions to look like. They are not designed to be professional and heavyweight, but lightweight. There are probably dozens of little bugs, because I don't know or have not properly taken care of a variety of internal R code issues. still, I like how this ended up, and there is no learning curve, so I

Hi, sorry, I'm an idiot.. and I know I'm missing something stupid.. I thought if we solve an underdetermine system with QR, my soln is: min ||x|| (L2 sense) such that Ax = b then say i have: > w <- matrix(c(1, 5), ncol=2) > sw = 2 > qrW = qr(t(w) %*% w) > qr.coef(qrW, t(w) %*% sw) [,1] [1,] 2 [2,] NA but we also have soln (0, 2/5) which obviously has a

On 02/10/2018 06:00 AM, r-help-request at r-project.org wrote: > Did you check the gradient? I don't think so. It's zero, so of course > you end up where you start. > > Try > > data.input= data.frame(state1 = (1:500), state2 = (201:700) ) > err.th.scalar <- function(threshold, data){ > > state1 <- data$state1 > state2 <- data$state2 >

Hello, I use rsync to mirror the home directories of users on a computational cluster for backup purposes. There are users who have single directories containing 12,000+ files. I am using RHEL 4.0 update 4, and the rsync is version: rsync version 2.6.3 protocol version 28 When rsync is deleting the files in a directory with 12,000+ files (i.e. when the directory was removed in the

In trying to use simplex() from the boot package, I have run into a situation that doesn't seem like it should be possible. It is claiming that it has solved the LP, but returns a vector of all zeros, which does not satisfy the constraints I passed in. A small example: > ubMatrix <- matrix(c(1,1,-1,0,-1,-1), 3, 2) > ubVector <- c(2,1,-1) > objective <- c(0,1) >

hi all i m using remote_function , & i need to update two divs at same time (so no :success/:failure).... is there any posiible soln for this thanks rohit --------------------------------- Yahoo! Photos Ring in the New Year with Photo Calendars. Add photos, events, holidays, whatever. -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hello, I am going to commit a patch below, it fixes several cases when vnconfig(8) fails but returns zero exit status. Are there any objections? http://www.freebsd.org/cgi/query-pr.cgi?pr=45754 Index: vnconfig.c =================================================================== RCS file: /home/ncvs/src/usr.sbin/vnconfig/vnconfig.c,v retrieving revision 1.13.2.6 diff -u -r1.13.2.6 vnconfig.c

I am trying to write a loop to forecast realized volatility over successive days for the purpose of VaR prediction using the HAR-RV-CJ model which is as follows: log(RV_t+1) = ?_0 + ?_CD log(CV_t) + ?_CW log(CV_t-5) + ?_CM log(CV_t-22) + ?_JD log(J_t + 1) + ?_JW log(J_t-5 + 1) + ?_JM log(J_t-22 + 1) + e_t where RV is realized volatility, CV is continuous volatility and J is the jump which is

Has anyone had any luck running DC Universe Online on wine? I'm having problems booting the station launcher: Distro: Ubuntu 10.04 Wine: Latest Stable from repo Stack output Code: C:\program files\steam\steamapps\common\dc universe online>Registration.url File not found Install script executed.err:ole:RevokeDragDrop invalid hwnd (nil) err:ole:RevokeDragDrop invalid hwnd 0x7011a

Add a copy of the libvirt-ocaml library, currently available at: https://libvirt.org/git/?p=libvirt-ocaml.git;a=summary This is a snapshot at commit d3ed8dcf1b0a6a8a855ceecbe0bb97f21e6665e3, which has all the features we need (and that builds fine). It is expected to stay synchronized with upstream, until there is a new upstream release, and it will be widespread enough. --- .gitignore

Now that we have a distinct branch in the generator when returning an enum or bitmask that cannot fail, we can use it in OCaml for symmetry, so that the result of a get function can be plugged into a set function without manual conversion of an integer. This includes the use of the recently-added UNKNOWN catch-all for encoding C values returned by a newer libnbd.so than when the OCaml bindings

Hi there R-helpers: I'm having problems with the function ode() found in the package deSolve. It seems that when my state variables are too numerous (>33000 elements), the function throws the following error: Error in vode(y, times, func, parms, ...) : cannot allocate memory block of size 137438953456.0 Gb In addition: Warning message: In vode(y, times, func, parms, ...) : NAs

From: Nicolas Cornu <ncornu at aldebaran.com> --- mtools/Makefile | 1 + mtools/syslinux.c | 59 +------------------------------------------------------ 2 files changed, 2 insertions(+), 58 deletions(-) diff --git a/mtools/Makefile b/mtools/Makefile index 0d0b1b2..c980420 100755 --- a/mtools/Makefile +++ b/mtools/Makefile @@ -9,6 +9,7 @@ SRCS = syslinux.c \

Fairly straightforward. A user can supply { "name"; None } or { "name"; Some "description" } as desired. Signed-off-by: Eric Blake <eblake@redhat.com> --- plugins/ocaml/NBDKit.mli | 9 ++++ plugins/ocaml/NBDKit.ml | 17 ++++++++ plugins/ocaml/example.ml | 33 +++++++++----- plugins/ocaml/ocaml.c | 92 +++++++++++++++++++++++++++++++++++++++- 4 files

Now that we have a distinct branch in the generator when returning an enum or bitmask that cannot fail, we can use it in OCaml for symmetry, so that the result of a get function can be plugged into a set function without manual conversion of an integer. While at it, add an abort() if OCaml ever hands us a value we can't translate to a C int (that one is unreachable per OCaml type safety), or

Fairly straightforward. I'd love for type export to be a bit more flexible to make description optional, but could not figure out how to decode that from the C side of things, so for now this just requires the caller to supply a description for all exports during .list_exports. Signed-off-by: Eric Blake <eblake at redhat.com> --- plugins/ocaml/NBDKit.mli | 9 ++++

RLenValue is similar to RLenType, though with one less argument. This required adding additional conversion functions for several languages' bindings. Signed-off-by: Alex Nelson <ajnelson at cs.ucsc.edu> --- generator/generator.ml | 78 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 78 insertions(+), 0 deletions(-) diff --git a/generator/generator.ml

I am working with xts dependent data, and my code is as follows (the problem is explained throughout): dat <- getdat("prices") dat <- read.zoo(dat, sep = "",format="%d/%m/%Y %H:%M", tz="", FUN=NULL, regular=TRUE, header=TRUE, index.column=1, colClasses=c("character", "numeric")) dat <- as.xts(dat)