search for: b205

....GlobalEnv, package:deSolve, package:stats, package:graphics, package:grDevices, package:utils, package:datasets, package:methods, Autoloads, package:base R. Woodrow Setzer, Ph. D. National Center for Computational Toxicology http://www.epa.gov/comptox US Environmental Protection Agency Mail Drop B205-01/US EPA/RTP, NC 27711 Ph: (919) 541-0128 Fax: (919) 541-1194

...252 Search Path: .GlobalEnv, package:stats, package:graphics, package:grDevices, package:utils, package:datasets, package:methods, Autoloads, package:base R. Woodrow Setzer, Ph. D. National Center for Computational Toxicology http://www.epa.gov/comptox US Environmental Protection Agency Mail Drop B205-01/US EPA/RTP, NC 27711 Ph: (919) 541-0128 Fax: (919) 541-1194

Hi, I get the following error message when loading the package odesolve ( R 2.2.1 - odesolve 0.5.14 - AMD64 - Linux Fedora Core 4 ) : > library(odesolve) Error in library.dynam(lib,package,package.lib) : shared library 'TRUE' not found Error: package/namespace load failed for 'odesolve' Any help would be greatly appreciated Ariel./

...the solvers after translation? 3) Are there special considerations not covered in R-exts for code translated with f2c? 4) Is there a better way to make the Fortran solvers reentrant? R. Woodrow Setzer, Ph. D. National Center for Computational Toxicology US Environmental Protection Agency Mail Drop B205-01/US EPA/RTP, NC 27711 Ph: (919) 541-0128 Fax: (919) 541-1194

Hi All, I am running R 2.2.0 on Mac OS 10.4.2, dual G5 processors with 8 Gig RAM. I am running a simulation with lsoda that requires ~378 s to complete one set of time intervals. I need to optimize the parameters, and so need to considerably speed up the simulation. I have tried to figure out how to change the appropriate memory allocation and have search R help and Introductory

Hi, I would like to solve a system of coupled ordinary differential equations, where there is a delay (time lag) term. I would like to use the "lsoda" function "odesolve" package. However, I am not sure how to specify the delay term using the syntax allowed by odesolve. Here is an example of the kind of problem that I am trying to solve: > library(odesolve)

Dear R experts, I have been encountering problems with the "optim" routine using "for" loops. I am determining the optimal parameters of several nested models by minimizing the negative Log-Likelihood (NLL) of a dataset. The aim is to find the model which best describes the data. To this end, I am simulating artificial data sets based on the model with the least number

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