R: Predictive Analysis

Working with Naïve Bayes in R

For this example of working with Naïve Bayes in R, we are going to use the Titanic dataset. The classification problem we have is to know whether or not individuals died in the Titanic accident. We will create a training dataset and a testing dataset (in order to test how well the classifier performs).

The first thing we need to know is how to convert the Titanic dataset (of class table) to a data frame:

1  Titanic.df_weighted = data.frame(Titanic)

Let's have a look at the dataset:

	Class	Sex	Age	Survived	Freq
1	1st	Male	Child	No	0
2	2nd	Male	Child	No	0
3	3rd	Male	Child	No	35
4	Crew	Male	Child	No	0
5	1st	Female	Child	No	0