Displaying 4 results from an estimated 4 matches for "montp".
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2002 Jul 30
1
Fwd: Reh Hat ipchains tricks
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2003 Dec 01
0
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2004 Aug 03
1
nlminb vs optim
Dear R-help group,
I have to maximize a likelihood with 40 parameters and I want to compare
the MLE given by "nlminb" (Splus2000, on Windows) with those given by
"optim" (R, on Unix).
1) On Splus,
The algorithm "nlminb" seems to converge (the parameters stabilize) , it
stops after several iterations ( around 400) with the message :"FUNCTION
EVALUATION LIMIT
2004 Nov 02
1
problem to solve a matrix
Dear R group,
I have to solve a hessian matrix 40*40, called M, in order to obtain the
standart deviations of estimators.
When I use the function solve(M), I have the following error message:
"Error in solve.default(M) : Lapack routine dgesv: system is exactly singular"
Do you know an alternative approach which could succeed? I have found some
information about the function