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zero division error when using ei utility function #516
Description
Describe the bug
Using bayesian-optimization==1.4.3 results in bayes_opt/util.py:169: RuntimeWarning: divide by zero encountered in true_divide z = a / std.
I used utility function like this
ei = UtilityFunction(kind="ei", xi=1e-1)
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Activity
t-muser commentedon Aug 20, 2024
Hi @Yoonho-Na,
It looks like the GP predicts a standard deviation of 0, which can happen because of many things. Without more information we can't really tell you what exactly is the cause here.
t-muser commentedon Aug 24, 2024
I will close this issue for now. Feel free to reopen with more information.