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spoptim
2010 Jun 26
4
optim() not finding optimal values
...9)
names(parsbox) <- c("B0","K","q","r")
( res2 <- SPsse(parsbox,d$catch,d$cpe,SSE.only=FALSE) )
Setting the starting values near the parameters shown in parsbox even resulted in a movement away from (to a larger SSE) those parameter values.
( SPoptim2 <- optim(parsbox,SPsse,B=d$catch,CPE=d$cpe) ) # run optim()
This "issue" most likely has to do with my lack of understanding of optimization routines but I'm thinking that it may have to do with the optimization method used, tolerance levels in the optim algorithm, or the shap...