Full_Name: Robert King
Version: 1.6.2
OS: linux
Submission from: (NULL) (134.148.20.33)
In optim, non-zero values of trace in the control list are treated as postitive,
even
if they are negative.
>From documentation:
trace
Integer. If positive, tracing information on the progress of the optimization is
produced. Higher values may produce more tracing information: for method
"L-BFGS-B" there are six levels of tracing. (To understand exactly what these do
see the source code: higher levels give more detail.)
example:
obj <- function(par){sum(par)}
par <- c(1,1,1)
optim(par,obj,control=list(trace=-1))
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