search for: pineiro

Displaying 3 results from an estimated 3 matches for "pineiro".

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2001 May 31
1
nlme and memory
I am trying to follow an example in Pineiro & Bates's book library(nlme) data(Soybean) soy.lis<-nlsList(weight~SSlogis(Time,Asym,xmid,scal),data=Soybean) soy.nlme<-nlme(soy.lis) Error: Calloc could not allocate (151974496 of 8) memory This is not a large problem-- only 412 observations. I am using R-1.2.3 with automatic memor...
2009 Apr 01
1
lme between-group and within-group covariance
Dear R users, I would be interested in using the lme() function to fit a linear mixed model to a longitudinal dataset. I know this function allows for the specification of a within-group covariance structure. However, does it allow for the explicit specification of a between-group covariance structure? Being able to specify both separately would be very important in the context of my project
2006 Oct 05
4
glm with nesting
I just had a manuscript returned with the biggest problem being the analysis. Instead of using principal components in a regression I've been asked to analyze a few variables separately. So that's what I'm doing. I pulled a feather from young birds and we quantified certain aspects of the color of those feathers. Since I often have more than one sample from a nest, I thought I