search for: nlmeode

Dear all, I have two questions: 1. Does anyone know if nlmeODE package will work once odesolve is discontinued? If i understand well nlmeODE depends on odesolve. 2. Can anyone suggest another package I could use to fit complex PKPD models (described using differential equations) to data? Thanks a lot! Magdalena

I am trying to use nlmeODE. But I don't know what is ObsEq. How you can get it from your ODEs system? Could someone help me out? Best, Ron

Dear All A new non-linear mixed-effects modelling package for R called nlmeODE is now available at www.cran.r-project.org and http://nlmeODE.sourceforge.net. It combines Pinheiro and Bates' NLME library in R with an ordinary differential equations (ODE) solver thereby enabling the use of differential equations in population PK/PD modelling. It includes several PK example...

Dear R-helpers, I have some problem with a model I am trying to run with nlmeODE. I have a covariate that I want to include in the model and I can't find in the documentation how to include it in the model so that it can calculate it. >formula(trial) PME ~ time | Ident abcnoniso <- list(DiffEq=list( debdt = ~ -ksol*pH*eb , d...

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

...ror in eval(as.name(varName), data) : Object "C1.lsoda" not found What part of the e-mail did I miss? I would like to get this problem up an running. Now, I am including Richar Upton's 2 cm model implementation and Christoffer Tornoe's nls solution (I recommend Christoffer's nlmeODE package for these problems also if multi-response data is available) The code follows: -------------------------------------------------------------- # Simulation of a 2 compartment pharmacokinetic model using "R" # Richard N. Upton, 11/3/02, richard.upton at adelaide.edu.au # The "...

Dear list, I have a degradation model: dX/dt = * I(X2)*( k1*X(t) )/( X(t)+k2 ) where X(t) is concentration at time t, and k1 and k2 are parameters that I want to estimate. I(X) is a known inhibitor function. My questions is whether this is implemented or easily computed in any R package. I have searched the archives but without luck. Any help or comments on this would be appreciated, Klaus

R-help -- I built R-2.2.1 in my own directory on a sun (solaris). Now I would like the sysadmin to move the contents to /usr/local/lib and place the binary in /usr/local/bin. No problem. However, the RHOME variable defaults to the directory from which R was built so it is not usable by anyone but me or ROOT. I would like to avoid building this again if possible. Any ideas? Thanks, Dan

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]]

Dear all, I wonder if there is a way to specify a model in differential equations for nlme(). Or in other packages? Appreciate any comment. Thanks. Jun Shen [[alternative HTML version deleted]]

Hello list I have a theoretical differential equation model (two coupled differential equations) describing the acidification of dairy cultures in milk: dX/dt = f(H, param)*X dH/dt = g(param)*dX/dt pH = -log10(H) I also have actual data of the same. I would like to estimate the parameters of the theoretical model from real data, but don't know how to go about it in R (I'm fairly new

Hi R-Users and Developers, Several months ago I made a request on Sourceforge to add the R/S - programming language to the _Trove_ categorization. ("The Trove is a means to convey basic metainformation about your project.") Today I got the following response of one of the sourceforge admins. <SNIP> SourceForge.net will consider the inclusion of a programming language within

Hi R-Users and Developers, Several months ago I made a request on Sourceforge to add the R/S - programming language to the _Trove_ categorization. ("The Trove is a means to convey basic metainformation about your project.") Today I got the following response of one of the sourceforge admins. <SNIP> SourceForge.net will consider the inclusion of a programming language within

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