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The convergence message for SAMIN is misleading. An example is
using Optim
rosenbrock(x, p) = (p[1] - x[1])^2 + p[2] * (x[2] - x[1]^2)^2
function main()
x0 = zeros(2)
p = [1.0, 100.0]
obj = x -> rosenbrock(x,p)
lb = fill(-100., 2)
ub = fill(100., 2)
prob = Optim.optimize(obj, lb, ub, x0, SAMIN(), Optim.Options(iterations=10^6))
end
main()
This code results in
SAMIN results
==> Normal convergence <==
total number of objective function evaluations: 23751
Obj. value: 0.0000000000
parameter search width
1.00000 0.00000
1.00000 0.00000
================================================================================
0.315491 seconds (964.68 k allocations: 52.287 MiB, 47.06% gc time, 97.00% compilation time)
* Status: failure
followed by additional output. The convergence criteria that Optim is checking are not directly applicable to the results that SAMIN generates. This output is for a successful run, but Optim is stating that it is a failure.
The text was updated successfully, but these errors were encountered:
The convergence message for SAMIN is misleading. An example is
This code results in
followed by additional output. The convergence criteria that Optim is checking are not directly applicable to the results that SAMIN generates. This output is for a successful run, but Optim is stating that it is a failure.
The text was updated successfully, but these errors were encountered: