MLDataTable.swift

let myTable = MLDataTable(...)

// Fetch the price column (and all it's values)
let priceColumn = myTable["price"]

// Create a new column that contains values that are the result of 
// price * bedroom for each row
let priceTimesBedroomsColumn = myTable["price"] * myTable["bedrooms"]

// Remove rows that contain less that 2 bedrooms
let filteredTable = myTable["bedrooms"] < 2