similar to: Ordinary differential equations in R?

I recently got a new machine, running RedHat Linux 7.0 (kernel 2.2.16, XFree864.0.1), and tried to install R-1.1.1 on it from the rpm file on CRAN. RPM complained about missing dependencies: libreadline.so.3 libtcl8.0 libtk8.0 The RH7.0 installation includes later versions of these libraries. I went ahead and forced an installation, and of course R wouldn't work. By linking

I am beginning a much-delayed update of odesolve to include several ordinary differential equation solvers from the Livermore package ODEPACK. These are much-used and reliable Fortran codes, and I plan (as I did for lsoda in the current odesolve package) to make as few changes as possible to the Fortran 77 code. However, recently someone wanted to make nested calls to lsoda, which will not work,

Hi, My Fedora 11 linux (version 2.6.30.9-96.fc11.x86_64 #1 SMP Wed Nov 4 00:02:04 EST 2009) recently updated me to R-2.10.0, and help.start() is no longer working. I see in the release notes that R now uses an internal web server to autogenerate help pages. Here's what I'm getting: IN R: > help.start() starting httpd help server ... done If

A colleague pointed me to this article advocating R as a Matlab substitute. Here is the link (deliberately on two lines: http://searchenterpriselinux.techtarget.com/ originalContent/0,289142,sid39_gci902076,00.html I'm not a Matlab user, but I understand that it provides a nice front end to the Linpack collection of numerical linear algebra routines. My friend and I wonder if R can really

I'm probably misunderstanding something in "Writing R Extensions" version 1.0.0. In the chapter on the R API, section 4.7, it is stated that the functions listed in R_ext/Linpack.h are available to users' Fortran code. I am developing a developing a library of ode solvers, based on lsoda and ddassl, and which in turn call some routines from linpack and double precision blas. I

Hi, Does somebody knows of the existence of a library of functions for solving differential equations, I need a solver for a system of non linear first order differential equations. I think there was something in IMSL but that was a long time ago and probably there are some new algorithms in the new now. Thanks for any pointers. . R. Heberto Ghezzo Ph.D. Meakins-Christie Labs McGill

Hi there, I have a set of data that looks like this: As1988<-c(1254.0, 22.0, 4.2, 1081.0, 35.0, 6.0, 1772.0, 192.0, 7.6) The mean of this (as calculated by R) is: 485.9778 The median of this (as calculated by R) is: 35 If I then make a beanplot(As1988), I find that the beanline (average) is now 77.68561 while the beanline (median) is 35.39739 (using the locator function to check the

> On Jun 21, 2017, at 12:48 PM, Marine Regis <marine.regis at hotmail.fr> wrote: > > Hello, > > I am developing an agent-based model to simulate the spread of infectious diseases in heterogeneous landscapes composed of habitat polygons (or clumps of connected cells). To simplify the model, I consider a habitat grid (or raster) containing the polygon ID of each cell. In

suddenly a few days ago it takes about a minute for local help to come up . i type : ?hist and get starting httpd help server ... done but only after a minute does http://127.0.0.1:15686/library/graphics/html/hist.html appear . Lee De Cola, PhD, MCP. DATA to Insight LDECOLA@COMCAST.NET Reston, Virginia 703 709 6972 571 315 0577 mobile [[alternative HTML version deleted]]

It seems that the method `iteration` in the function `ode` can be useful in my case: > Method "iteration" is special in that here the function func should > return the new value of the state variables rather than the rate of > change. This can be used for individual based models, for difference > equations, or in those cases where the integration is performed within >

Hello, I am developing an agent-based model to simulate the spread of infectious diseases in heterogeneous landscapes composed of habitat polygons (or clumps of connected cells). To simplify the model, I consider a habitat grid (or raster) containing the polygon ID of each cell. In addition, I have epidemiological parameters associated with each polygon ID. At each time step, the parameter values

Dear R users, an improved version of package deSolve (version 1.3) is now available on CRAN. deSolve, the successor of R package odesolve, is a package to solve initial value problems (IVP) of: - ordinary differential equations (ODE), - differential algebraic equations (DAE) and - partial differential equations (PDE). The implementation includes stiff integration routines based on the ODEPACK

Dear R users, an improved version of package deSolve (version 1.3) is now available on CRAN. deSolve, the successor of R package odesolve, is a package to solve initial value problems (IVP) of: - ordinary differential equations (ODE), - differential algebraic equations (DAE) and - partial differential equations (PDE). The implementation includes stiff integration routines based on the ODEPACK

(First time post. Please be kind!) I've done some googling, read up on speex, found this mailing list, and have been following it for a few weeks. Now I really have to ask: Can it really be true that there are as yet no hardware phones which support the speex codec? Hard to believe (unless perhaps there's a good technology reason?) I'm not a developer - I'm a purchaser. I

Hi! Trying to make a forecast, and get the following error message: Error in NextMethod("[<-") : subscript out of bounds The script is as follows: > Forecast.A <- ts(matrix(NA, nrow=25, ncol = 1, + dimnames = list(c(), c("Outcome"))), + start = c(2006, 10), frequency = 12) > for (i in 1:25) { + j <- i + 321 + Data <- window(omxr, end = time(omxr)[j]) +

Greetings, I sent the message below to the developer of the contributed R package "sspir", but have yet to receive any response. I would be very grateful for any advice people have on the matter. Thanks, Mark -------- Original Message -------- Subject: possible bug in sspir? Date: Tue, 19 May 2009 16:08:41 -0700 From: Mark Scheuerell <mark.scheuerell at noaa.gov> To:

Le Sat, Nov 18, 2017 at 03:26:53PM -0800, Bill Harris a ?crit : > Incidentally, you can see a bit more complete description at > https://unix.stackexchange.com/questions/402560/how-do-i-install-r-on-debian-stretch-given-the-r-api-3-issue > . Hi Bill and everybody, if one installs R >= 3.4.2 from any source, then some Debian packages will be broken. The change of r-api virtual

Hi folks, I am planning to write some more time-consuming matrix manipulations in c++. What is the experience with the existing c++ matrix libraries? Do you have some recommendations? Are some libraries more compatible with R than the others? All suggestions welcome! Best, Ott

Dear Hank, Last question first: really, only you can say for sure if 4e-281 and 5e-11 are small enough; it depends on the units you measure your state variables in. However, this strategy cannot get the state variables to exactly 0. Obviously, you could get closer to 0.0 faster by setting the derivatives even larger in absolute value. You may run into problems with the solver when the

Hi All It has been suggested to me that the folks in this list might be able to help me out of my misery. As part of my learning curve to building a rather detailed model of a small neurone complex I am implementing some existing models in R. For the moment I want to implement the Izhikevich model as described in his 2003 paper. The equations are as follows: v' = 0.04v^2 + 5v + 140 - u - I