When using NGOpt, Print the selected Optimizer
kayuksel opened this issue · comments
Hello everyone, is there an easy way of printing the name of the utilized optimizer for the problem, when using any of the NGOpt?
Try this:
import nevergrad as ng
optimizer = ng.optimizers.NGOpt(parametrization=2, budget=100)
print(optimizer.optim)
Result:
Instance of MetaModel(parametrization=Array{(2,)}, budget=100, num_workers=1)
Note that some of the multi-choice optimizers (e.g. CMandAS3) have multiple optimizers, which are accessed via "optims" (plural) instead.
Hello again,
It gives me the following error: '_DE' object has no attribute 'optim'
My code is as follows. I am optimizing using every optimizer available.
I guess that optim only exists for combined optimizers like NGOpt?
for optimizer_name in [x for x in dir(ng.optimization.optimizerlib) if x[0].isupper() and not x.startswith("_")]:
try:
if optimizer_name in ['BO', 'BOSplit', 'EDA', 'MEDA', 'HyperOpt', 'MPCEDA', 'PCEDA']: continue
best_reward = 1000000000000000000
optimizer_class = getattr(ng.optimization.optimizerlib, optimizer_name)
optimizer = optimizer_class(parametrization=ng.p.Array(shape=(len(assets,),)), budget=60)
x = optimizer.minimize(train).value
print('%s %f' % (optimizer_name, test(x)))
except Exception as e:
print(e)
continue
You are correct. "optim" and "optims" only work for combined optimizers.
For all optimizers you can use optimizer.name:
import nevergrad as ng
optimizer = ng.optimizers.Cobyla(parametrization=2, budget=100)
print(optimizer.name)
Result:
Cobyla
Note that this will return "NGOpt" for NGOpt instead of the optimizer that it selects.
Thank you.