Hyperparameters are parameters that are set by you before training your model.
They are usually arbitrary and iterative in nature.
Examples:
There is a mismatch between the first code example in section 19.1.1.2 and its explanation. To be correct, either the equation needs to be changed to “stats.loguniform(1e-4, 0.1)” or the text to " which represents a uniform distribution between -4 and 0 in the logarithmic space."
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It is in chapter 3.2.4