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ml5.js - Interview Questions
How many steps "Quickstart" in ml5.neuralNetwork?
In general the steps for using the ml5.neuralNetwork look something like : 
 
Step 1 : load data or create some data
Step 2 : set your neural network options & initialize your neural network
Step 4 : add data to the neural network
Step 5 : normalize your data
Step 6 : train your neural network
Step 7 : use the trained model to make a classification
Step 8 : do something with the results

The below examples are quick
 
Creating data in real-time
// Step 1: load data or create some data 
const data = [
  {r:255, g:0, b:0, color:'red-ish'},
  {r:254, g:0, b:0, color:'red-ish'},
  {r:253, g:0, b:0, color:'red-ish'},
  {r:0, g:255, b:0, color:'green-ish'},
  {r:0, g:254, b:0, color:'green-ish'},
  {r:0, g:253, b:0, color:'green-ish'},
  {r:0, g:0, b:255, color:'blue-ish'},
  {r:0, g:0, b:254, color:'blue-ish'},
  {r:0, g:0, b:253, color:'blue-ish'}
];

// Step 2: set your neural network options
const options = {
  task: 'classification',
  debug: true
}

// Step 3: initialize your neural network
const nn = ml5.neuralNetwork(options);

// Step 4: add data to the neural network
data.forEach(item => {
  const inputs = {
    r: item.r, 
    g: item.g, 
    b: item.b
  };
  const output = {
    color: item.color
  };

  nn.addData(inputs, output);
});

// Step 5: normalize your data;
nn.normalizeData();

// Step 6: train your neural network
const trainingOptions = {
  epochs: 32,
  batchSize: 12
}
nn.train(trainingOptions, finishedTraining);

// Step 7: use the trained model
function finishedTraining(){
  classify();
}

// Step 8: make a classification
function classify(){
  const input = {
    r: 255, 
    g: 0, 
    b: 0
  }
  nn.classify(input, handleResults);
}

// Step 9: define a function to handle the results of your classification
function handleResults(error, result) {
    if(error){
      console.error(error);
      return;
    }
    console.log(result); // {label: 'red', confidence: 0.8};
}
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