search for: optimizatzion

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2010 Jul 05
3
selection of optim parameters
...ateLogLikelyhood, c(0.4, 2, 0.4, 80000, 0.8), lower=c(0,0,0,0,0), upper=c(1, 5, Inf, Inf, 1), control=list(trace=1, maxit=1000)) Unfortunately the result doesn't seem to be reasonable. 3 of the optimized parameters are on the boundaries. Unfortunately I don't have much experience using optimizatzion methods. That's why I am asking you. Do you have any hints for me what should be taken into account when doing such an optimization. Is there a good way to implement the boundaries into the code (instead of doing it while optimizing)? I've read about parscale in the help-section. Unfor...