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--- On Mon, 3/12/12, aleksandr shfets <a_shfets at mail.ru> wrote: > From: aleksandr shfets <a_shfets at mail.ru> > Subject: Fwd: Re[2]: [R] B-spline/smooth.basis derivative matrices > To: "Vassily Shvets" <shv736 at yahoo.com> > Received: Monday, March 12, 2012, 5:15 PM > > > >...

...wth values for a vector of individuals measured at different times. Can I understand correctly that the program estimates parameters for the growth model based on a regression(linear or non linear) analysis of the data at time 1 to time 2, then time 2 to time 3, building a curve piecewise? regards, shfets [[alternative HTML version deleted]]

...kely to be significant(in the ordinary sense!)? That is, having made a lot of models from a data set, then the best two are say 78.2 and 79.3 without and with (a second independent variable respectively) should we say it's better to judge the influence of the 2nd IV as insignificant? regards, -shfets [[alternative HTML version deleted]]

...he estimates returned for all these would be in accordance with the Value listing in the negbin entry in the aod reference pdf, that is, they are objects "of formal class "glimML"", that is they are maximum likelihood estimates. Would someone tell me if I'm correct? regards, shfets

...ferent conditions. I'm a bit familiar with grofit, but also reading about dse and dlm. Following Bolker's Ch. 11 it seems there are many paths open, and I add that with my data, collection of 5 time points(needed for grofit) is a gargantuan task. I'd be grateful for any advice- regards, shfets

Hello, I'm hoping someone with a wide experience with R may be able to see what the program is trying to tell me. I've got an array: y1=rnorm(41,0.2) y2=rnorm(41,0.2) y3=rbind(y1,y2) data11<-array(0,c(41,2,2)) data11[,1,]=y3 data11[,2,]=y3 rownames(data11)<-rownames(data11, do.NULL = FALSE, prefix = "Obs.") colnames=c("V","R")

...le bit of commentary as to the > multiplicity of > 'experiments'. For example, what is the minimum number of > data points(not > time points) to obtain a model? Would it be similar to the > approximately 12 > that we read will give us a basic regression? > regards, > shfets > > On Mon, Mar 22, 2010 at 2:43 PM, alexander russell <ssv736 at gmail.com> > wrote: > > > Hello, > > I'm trying to understand grofit's estimation of > models, and fairly new to > > growth models generally. The data used by grofit > consists of...

Hello, It's not easy to express clearly what I have in mind by stochastic growth models. I've been working with a couple of titles -Stochastic Models in Biology, for one, but both date back a decade or more. I'll try to illustrate the model a little more. A reasonably comparable situation is Bolker's analysis of how many flowers are created on a given plant among a patch of