[R] regression fit

Hi every one. I want to analyze my data. The y (density) is very skewed to the right. this is my tentative fit-density~factor(Site)+factor(Species)+ depth. which model to apply between glm and lm, for sure I can not use lm( This is non linear data) -- View this message in context:

[R] logistic growth model

HI I want to Fit a logistic growth model for this data set where y = k*exp(b0+b1(age))/1 + exp(bo+b1(age)), start = list(b0 = 3, b1 = 3.5 ), trace = TRUE) I need to find the initial valued for b0 and b1. K =3. When I run using b0=3 abd b1 = 3.5, or any number I get the

[R] nls package

Hi I want to analyse my data (using nonlinear regression ) but I can not load and install the package. this package (nls) not available in my R. how get it. -- View this message in context: http://r.789695.n4.nabble.com/nls-package-tp3541485p3541485.html Sent from the R help mailing list

Re: [R] nls package

Please let me know how to get this package. Thanks On Sat, May 21, 2011 at 9:50 PM, dslowik [via R] ml-node+3541502-716551039-239...@n4.nabble.com wrote: nls is part of the stats 'package'. -- If you reply to this email, your message will be added to the