Comments (2)
Hi Martin,
See my comment on the other issue. So we should only expect the last two trials (in a generataion of 10) to have changed learning rates. However, you're right that K.set_value(model.optimizer.lr, trial.parameters['lr'])
actually doesn't work. Keras will happily accept this command but internally it won't actually change the learning rate of the training. Changing the learning rate of a compiled model in Keras is actually non-trivial. Same for dropout. Batch size should be easy. Sherpa should pass a modified batch_size (again only for the bottom 20% of the population) and so long Keras reads the training batchsize from trial.parameters
it should be correct.
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In the 11. trial for example, the model from the 6. trial is loaded and modified by the algorithm. However, the learning rate is the same - this is the case for all trials.
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