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spss
2010 Jun 26
4
optim() not finding optimal values
I am trying to use optim() to minimize a sum-of-squared deviations function based upon four parameters. The basic function is defined as ...
SPsse <- function(par,B,CPE,SSE.only=TRUE) {
n <- length(B) # get number of years of data
B0 <- par["B0"] # isolate B0 parameter
K <- par["K"] # isolate K parameter
q <- par[&qu...