code: def getDatetimeAxis():
    
    dataSet = 'nyc_taxi'
    filePath = './data/' + dataSet + '.csv'
    data = pd.read_csv(filePath, header=0, skiprows=[1, 2],
                       names=['datetime', 'value', 'timeofday', 'dayofweek'])
  
    xaxisDate = pd.to_datetime(data['datetime'])
    return xaxisDate
docs: use datetime as x-axis