D3 OOPy quantizer for 1-5 range

gistfile1.js

// Quantizing data into buckets

function Quantizer(data_array) {
  min = d3.min(data)
  max = d3.max(data)

  this.quantizeNumber = d3.scale.quantize()
      .domain([min,max])
      .range([1,5]) // Start with only mapping on 1-5 color scale
}

/* Test for Quantizer
data = [1,2,3,10];
var quantizer = new Quantizer(data)
console.log(quantizer.quantizeNumber(2));
console.log(quantizer.quantizeNumber(10));
*/