Max Entropy Sampling favors the lower limit

burakbagdatli — Thu, 08 Jun 2023 21:10:42 GMT

When I create small maximum entropy designs, I get unbalanced distributions for the variables. It's mostly regular and with some extra points at the ends; however, the lower end is sampled much more frequently than any other point. I have tried it many times and attached a few examples to this message. If needed, I can provide more.

As you can see from the screenshot above, -1 is sampled must more frequently than any other value. Even with a continuous distribution it's clear that the lower limit is sampled more frequently:

However, it doesn't always happen. Unfortunately, in my experience, it happens more often than not. I have attached a few designs where the issue appears and disappears.

Re: Max Entropy Sampling favors the lower limit

Mark_Bailey — Thu, 04 Aug 2022 14:38:59 GMT

It is very difficult to assess the design one factor at a time. The solution must satisfy a multivariate criterion. Looking at two factors at a time, still short of all 20 factors, shows a smoother spread of runs.

If you believe that there is a problem with your design, you should reach out to JMP Technical Support (support@jmp.com) for resolution. If so, please reply with their findings and your conclusion.

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Max Entropy Sampling favors the lower limit

Re: Max Entropy Sampling favors the lower limit