similar to: solving first-order differential equation

Hello, I want to know if there are some functions or packages to solve differential and integral equation using R. Thanks. Shao chunxuan. [[alternative HTML version deleted]]

Hello, I have downloaded the rmutil package in the form of *.tar.gz compressed file (I would like to use the runge-kutta() function). The package rmutil does not appear in the list of available packages. Can any one help? Massoud Boroujerdi PhD [[alternative HTML version deleted]]

Hello! I would like to know if R can solve Differential Equations... I don't think so because, in my point, I see R like a Statistical System, not a Math System. Am I wrong? Thank you very much. M??rcio de Medeiros Ribeiro Graduando em Ci??ncia da Computa????o Departamento de Tecnologia da Informa????o - TCI Universidade Federal de Alagoas - UFAL Macei?? - Alagoas - Brasil Projeto CoCADa

I have own function wrote. I used an algorithm, which was written in Matlab. in matlab: ... gamma = inv(v)*g; ... #v = matrix of variable size, v=vv(k) => k=2 => dimension of v 2x2 #g = a line vector with 4 elements e.g. g=[1,0,2,0]; my rewritten r-file: ... gamma = solve(v)*g; ... which is my error? Who can help me? thank you in advance. Chris -- Lust, ein paar Euro nebenbei zu

Hello Johannes: I'm sorry, but I still have the same problem with Rkward. After running apt-get update, I still can not find the amd64 version of the Rkward package. I have tried it with the following sources: deb http://cran.r-project.org/bin/linux/debian stretch-cran34/ deb http://chem.uft.uni-bremen.de/ranke/r-cran stretch-cran34/ deb

Hi: I have tried to upgrade from version 3.4.0 to 3.4.1 in a Debian Stretch following the instructions of the web page: https://cran.r-project.org/bin/linux/debian/ but after updating, Rkward does not work (Error in RK: Graphics API version mismatch). Analyzing the problem, I notice that the Rkward package is not available in the amd64 version (yes in the i386 version), for example here:

Hi Johannes: Thank you very much. Rkward now works. The only drawback is that I had to install it "by hand": sudo dpkg -i rkward_0.6.5-1~stretchcran.0_amd64.deb rkward-data_0.6.5-1~stretchcran.0_all.deb By default, apt-get installed the Debian repository version (rkward 0.6.5-1+b1 0.6.5-1+b1). Thanks for your contributions to the R-Debian project! Regards. Griera. On Mon, 25

Dear R developers, I am a little disappointed that my bug report only made it to the wishlist, with the argument: Well, it does not say it has. Only relevant to prediction intervals. predict.lm does calculate prediction intervals for linear models from weighted regression, so they should be correct, right? As far as I can see they are bound to be wrong in almost all cases, if no weights

Hello veryone, I am interested in the diffusion of particles inside a sphere, and its release through a small pore on the sphere surface. Unfortunately, I have not found the way to do this in R. Could you help me? Thank very much in advance for your help

I recently was forced to do a dist-upgrade and rebuild my kernel, so a lot has changed on my system, and I don't know if that is related to the errors & warnings I get from apt-get update. Any ideas? thanks -Michael euclid:~# apt-get update Get: 1 http://debian.yorku.ca stable Release.gpg [378B] Get: 2 http://debian.yorku.ca stable/updates Release.gpg [189B] Get: 3

R 2.6.1 is on its way to Debian unstable. I removed the references to gcc-4.2, so backporting should be easier. One thing I lfet in was the shlibs.local which will make R depend on tk8.4 newer than what testing and Ubuntu have, so Johannes and Vincent may need to remove the file. Debian testing users cannot run the unstable binaries as libc6 is ahead on unstable. We'll have to wait for libc6,

Hi, I am revising a paper that I am a co-author of. The figures are plots generated from R but at the moment I do not have the R code that generates them. As this is time critical I would like to slightly abuse the list by asking whether anyone knows how to extract from MS Word into a stand-alone graphics file a plot that was pasted into Word from R (probably as a Windows Metafile, but possibly

Dear all, as the bug # 7991 is flagged not-reproducible, let me give you some pieces of code, as I have the same or similar problem. The problem always shows up with the first example (a small text file) and only sometimes (but without obvious pattern) with the second example, which is a binary file. > download.file("ftp://ftp.nhc.noaa.gov/pub/atcf/btk/bal012006.dat",

I am trying to install the gls package (a wrapper for GNU scientific library special functions) package under Ubuntu 5.10. I have gls-bin (the debian GNU Scientific Library binary package). When I try to install the R package, I receive the following. > install.packages("gsl",dependencies=T) Warning in install.packages("gsl", dependencies = T) : argument

Hi I just upgraded my R from stabel/etch from 2.4.x to 2.6.2 via sudo apt-get install r-base which worked fine, installing all dependencies From R, as root, I did update.packages() but a number of packages packages failed to install, either for missing gfortran or missing dependencies. Warning messages: 1: In install.packages(update[instlib == l, "Package"], l, contriburl =

I needed to upgrade to R 2.4.1 from debian stable maintained at http://cran.r-project.org/bin/linux/debian/. and tried to upgrade with apt-get install r-base. It installed R 2.4.1 successfully, but ran into errors while also upgrading r-recommended packages. I was able to fix that using apt-get install -f euclid:~# aptitude install r-base Reading Package Lists... Done Building Dependency

Dear All, I am looking for the best way to use graphs from R (like xyplot, curve ...) for a presentation with powerpoint. I used to save my plot as pdf and after to copy them as image in powerpoint but the quality is not optimal by so doing. Another completely independent question is the following: when I use "main" in the xyplot, the main title is very close to my plot,

At ORNL, we worked with VisIt (a sibling of Paraview, both funded largely by DOE) around 2016 and made an in situ demo with R. We used packages pbdMPI (on CRAN) and pbdDMAT (on GitHub/RbigData), which were in part built for this purpose. Later also the package hola (on GitHub/RbigData) was built to connect with adios2, which can do buffered in situ connections with various codes. But the VisIt

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