Naive Bayes Classification for categorical values

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Ege 2014-11-25

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https://ww2.mathworks.cn/matlabcentral/answers/164305-naive-bayes-classification-for-categorical-values

评论： Ege 2015-1-4

Hi, I have a dataset containing numerical and categorical data. I like to use Naive Bayes Classifier in the following link but it only confers with numerical values.

http://www.mathworks.com/matlabcentral/fileexchange/37737-naive-bayes-classifier/content//NaiveBayesClassifier.m

Does anyone have an idea about how to extend that code to categorical data as well?

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Sean de Wolski 2014-11-25

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https://ww2.mathworks.cn/matlabcentral/answers/164305-naive-bayes-classification-for-categorical-values#answer_160239

在 MATLAB Online 中打开

Convert the categoricals to doubles.

c = categorical({'red';'blue';'red'})
double(c)

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Sean de Wolski 2014-11-26

The table is nice for storing but not for these computations. Reconvert to a table after with the same names from the original table (T.properties.variableNames).

Ege 2015-1-4

Hi i just realized that converting categorical to double makes things complicated. For example it gives different values to the ones that are actually same. I see values 127 ,96 all sort of different ones in a column where all of them were actually 'yes'. So what should I do about it?

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