Hi,
We want to use the cost of observation feature. We plan to set the USD cost of each observation. However, when we use the Diagnosis function, a red NOT BENEFICIAL text is displayed instead of a number in each line. What should we do to achieve the expected behavior?
cost of observation
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- Site Admin
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Re: cost of observation
NOT BENEFICIAL is displayed when the diagnostic value of the observation is negative. The negative value can be calculated when the observation has an associated cost. The actual formula is
V = cross-entropy - alpha * costs
where alpha is the entropy/cost ratio, which you can modify in GeNIe's diagnostic window (it is equal to 1 by default). If you reduce the alpha, you should see your observations numbers back in black.
For more details, refer to GeNIe's manual Entropy/Cost ratio section in the Diagnosis Window chapter (currently number 6.4.6 in the PDF version).
V = cross-entropy - alpha * costs
where alpha is the entropy/cost ratio, which you can modify in GeNIe's diagnostic window (it is equal to 1 by default). If you reduce the alpha, you should see your observations numbers back in black.
For more details, refer to GeNIe's manual Entropy/Cost ratio section in the Diagnosis Window chapter (currently number 6.4.6 in the PDF version).
Re: cost of observation
Thanks. Even when I set Entropy/Cost to extremely small (0.00001) I get some NOT BENEFICIAL values in the list. I am not sure what to improve. Can you help?
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- Site Admin
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- Joined: Mon Nov 26, 2007 5:51 pm
Re: cost of observation
You can reduce the max entropy/cost ratio (the dropdown in the upper-right corner of the diagnosis window), then use the E/C slider to move the alpha to a very low value. You should see your observations appear back in black (because alpha close to zero should make the cost influence vanish in the equation).