Displaying 2 results from an estimated 2 matches for "bentrevisor".
2010 Dec 04
1
Quadratic programming with semi-definite matrix
Hello.
I'm trying to solve a quadratic programming problem of the form min
||Hx - y||^2 s.t. x >= 0 and x <= t using solve.QP in the quadprog
package but I'm having problems with Dmat not being positive definite,
which is kinda okay since I expect it to be numerically semi-definite
in most cases. As far as I'm aware the problem arises because the
Goldfarb and Idnani method first
2010 Aug 03
0
Multilevel GEE (2 nested clusters)
Hi R-Help.
I am working on a data set with a 3-level nested structure. I have
individuals nested in households and multiple observations on each
individual. I assume that the individuals inside a given household are
correlated and that the individuals are correlated with themselves
over time. The data is not balanced.
I have computed a GLMM with logit link function and two random normal