search for: evansochiaga

Hi to all, Is there a way we can fit a non linear model to a data using non linear least square method without necessarily initialising the parameters of the model. I find it hard to get the initial value of the parameter. Below is a sample of the code I have. *nachman<-nls(OARmedium$OCCUPANCY~1exp(-alpha*OARmedium$MEAN^beta),start=list(alpha=0.2,beta=0.1),data=OARmedium)summary(nachman)*

...ually take more time and computing effort because it tries hard to reduce the SS. A reproducible example would get you a more informed response. John Nash On 15-03-19 07:00 AM, r-devel-request at r-project.org wrote: > Date: Wed, 18 Mar 2015 14:14:12 +0200 > From: Evans Otieno Ochiaga <evansochiaga at aims.ac.za> > To: r-devel at r-project.org > Subject: [Rd] Help > Message-ID: > <CAObCh3XfvtCz+qWtSS+pSPrhWtUKtdZoYANN=_4AJndziiiDOQ at mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > Hi to All, > > I am fitting some models to a da...

Hi to All, I am fitting some models to a data using non linear least square, and whenever i run the command, parameters value have good convergence but I get the error in red as shown below. Kindly how can I fix this problem. Convergence of parameter values 0.2390121 : 0.1952981 0.9999975 1.0000000 0.03716107 : 0.1553976 0.9999910 1.0000000 0.009478433 : 0.2011017 0.9999798 1.0000000

Hi to All, I am building a package in R and whenever I run command "R CMD build OAR" in the terminal, I get the following error: * checking for file ?OAR/DESCRIPTION? ... OK * preparing ?OAR?: * checking DESCRIPTION meta-information ... ERROR Malformed Depends or Suggests or Imports or Enhances field. Offending entries: R (>=3.0.2) Entries must be names of packages optionally