Displaying 2 results from an estimated 2 matches for "baging".
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2003 Apr 16
2
Jackknife and rpart
Hi,
First, thanks to those who helped me see my gross misunderstanding of
randomForest. I worked through a baging tutorial and now understand the
"many tree" approach. However, it is not what I want to do! My bagged
errors are accpetable but I need to use the actual tree and need a single
tree application.
I am using rpart for a classification tree but am interested in a more
unbaised estimator of...
2006 Jun 01
1
setting the random-effects covariance matrix in lme
Dear R-users,
I have longitudinal data and would like to fit a model where both the variance-covariance matrix of the random effects and the residual variance are conditional on a (binary) grouping variable.
I guess the model would have the following form (in hierarchical notation)
Yi|bi,k ~ N(XiB+Zibi, sigmak*Ident)
bi|k ~ N(0, Dk)
K~Bernoulli(p)
I can obtain different sigmas (sigma0 and