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Simple Bayesian method to solve the question of pneumonia. Pneumonia corresponding four characteristics: fever, pain, cough and blood cell abnormalities, determine the risk of pneumonia or not, the four characteristics of conditional independence. Assumptions suffering from pneumonia or not and four features can be represented as Ture and False. The pneumonia.tex file data (500 lines, each line of the first 4 numbers corresponding to the four characteristic variables, number 5 corresponds suffering from pneumonia, is true, and 0 represents False and 1 indicates Ture), programming solving: a Q: file suffering from pneumonia for true and for false proportion suffering from pneumonia as true, fever, pain, cough, blood cell abnormalities for the true proportion suffering from pneumonia is false, fever, pain, cough, blood cell abnormalities as Really ratio. B Q: demand when there is the possibility of suffering from pneumonia symptoms of fever and cough, but no pain and blood cell abnorma