import os


def parse_dataset(dataset_name):
    assert(os.path.exists(dataset_name))
    f = open(dataset_name, 'r')
    lines = f.readlines()
    f.close()

    time = []
    frequency = []
    amplitude = []

    for i in range(len(lines)):
        l = lines[i].strip()

        if len(l) > 0 and l[0] is not '#':
            temp = list(map(float, l.split()))

            time.append(temp[0])
            frequency.append(temp[1])
            amplitude.append(temp[2])

    return time, frequency, amplitude