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# Naive Bayes - RapidMiner Operator Reference manual

Member Posts: 1 Contributor I
edited September 2019 in Help
through the Naive Bayes Model in the RapidMiner Operator Reference (pdf) found here -http://rapidminer.com/documentation/
In the Naive Bayes model (page 653/990) they are calculating the maximum
calculated probability for each label value.
1. They calculate the Posterior probability of label=Yes = >9/14,
2. Value from distribution table when Outlook = sunny and label = yes (i.e.*0.223*)

I understand  posterior probability 9/14, How did they calculate 0.223? How did they arrive at this value?

Thanks,
Ram
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Moderator, Employee, Member Posts: 114 RM Data Scientist
Hi ozzboy,

the value from the distribution table for the case Outlook = sunny and label = yes  will be calculated as 2 / 9 because there are 2 examples that fit the constraints having 9 times the occurrence of label = yes. The values in the operators manual do slightly differ because they have been computed using the Laplace option. If you disable this default parameter you should get a distribution table containing the expected values.

Cheers,
Helge
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Member Posts: 1 Contributor I

How the laplance correction work in this case to derive 0.2333?