var parsingOptions = MLDataTable.ParsingOptions()

parsingOptions.containsHeader = true // the first line of my csv was: text,label
parsingOptions.delimiter = "," // my columns were separated by commas, but could be semi-colons, etc
parsingOptions.lineTerminator = "\n" // my rows were separated by new lines

var data = try MLDataTable(contentsOf: csv, options: parsingOptions) // using the parsing options

// using names to identify the columns
let labelColumnName = "label"
let stringLabelColumnName = "stringLabel"
let textColumnName = "text"

// setting the map of values I want each number to represent
let labelsDictionary: [Int : String] = [
    0: "sadness",
    1: "joy",
    2: "love",
    3: "anger",
    4: "fear"
]

// go through each entry in the label column, and create a new column that uses the string values
let stringLabelColumn = data[labelColumnName].map { label -> String in
    return labelsDictionary[label] ?? "unknown"
}

// remove the old column, and add the new one to our MLDataTable
data.removeColumn(named: labelColumnName)
data.addColumn(stringLabelColumn, named: stringLabelColumnName)