Naive Bayes Classifier JS

With Node JS, Express and MySQL

A. How to Configure:

1. Install Backend Prerequisite.

• Move to cd backend
• Run npm i express mysql2 sequelize cors mathjs

2. Configure Database.

• Set the database connection in "backend/config/Database.js"
• Import "sample.sql" to 'naive_bayes_js' database.

3. Run Server.

• Check nodemon -v. If you have not installed yet, run npm i -g nodemon
• Start backend server with nodemon index (Make sure your terminal path is on "your-project/backend")

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B. How to Use:

• First of all, you need to calculate "sample" table with Naive Bayes algorithm first, then it will be summarized as "NB_dataclass" table. You can use Rest Client or POSTMAN. Run it once.

POST http://localhost:5000/CreateNaiveBayesDataset
Content-Type: application/json

• Then, put your input on x1, x2, x3, and x4 and run it. It will classify the genre from your input.

POST http://localhost:5000/NaiveBayesClassifier
Content-Type: application/json

{
    "x1": 30, "x2": 922001, "x3": 3631, "x4": 3726
}

After process completed, the output will be like this:

{
  "msg": "Calculation Completed! Your input is classified as:",
  "result": [
    {
      "genreIs": "Hardrock",
      "probability": 0.024855977439682212
    }
  ]
}