机器学习常用数据集

野性酷女 2022-03-21 04:08 611阅读 0赞

1.  鸢尾花卉数据集（Iris data）。此样本数据是机器学习和统计分析最经典的数据集，包含山鸢尾、变色鸢尾和维吉尼亚鸢尾各自的花萼和花瓣的长度和宽度。总共有150个数据集，每类有50个样本。用Python加载样本数据集时，可以使用Scikit Learn的数据集函数，使用方式如下:

from sklearn import datasets
    iris = datasets.load_iris()
    print(len(iris.data))
    150
    print(len(iris.target))
    150
    print(iris.target[0]) # Sepal length, Sepal width,Petal length,Petal width
    [ 5.1 3.5 1.4 0.2]
    print(set(iris.target)) # I. setosa, I. virginica, I. versicolor
    { 0, 1, 2}

2.出生体重数据（Birth weight data）。此样本数据集是婴儿出生体重以及母亲和家庭历史人口统计学、医学指标，有189个样本集，包含11个特征变量。使用Python访问的数据的方式：

import requests
    birthdata_url = 'https://www.umass.edu/statdata/statdata/data/
    lowbwt.dat'
    birth_file = requests.get(birthdata_url)
    birth_data = birth_file.text.split('\'r\n') [5:]
    birth_header = [x for x in birth_data[0].split( '') if len(x)>=1]
    birth_data = [[float(x) for x in y.split( ')'' if len(x)>=1] for y
    in birth_data[1:] if len(y)>=1]
    print(len(birth_data))
    189
    print(len(birth_data[0]))
    11

1.  波士顿房价数据（Boston Housing data） 。此样本数据集保存在卡内基梅隆大学机器学习仓库，总共有506个房价样本，包含14个特征变量。使用Python获取数据的方式：

import requests
    housing_url = 'https://archive.ics.uci.edu/ml/machine-learningdatabases/housing/housing.data'
    housing_header = ['CRIM', 'ZN', 'INDUS', 'CHAS', 'NOX', 'RM',
    'AGE', 'DIS', 'RAD', 'TAX', 'PTRATIO', 'B', 'LSTAT', 'MEDV0']
    housing_file = requests.get(housing_url)
    housing_data = [[float(x) for x in y.split( '') if len(x)>=1] for
    y in housing_file.text.split('\n') if len(y)>=1]
    print(len(housing_data))
    506
    print(len(housing_data[0]))
    14

4.MNIST手写体字库：MNIST手写体字库是NIST手写体字库的子样本数据集，网址：[https://yann.lecun.com/exdb/mnist/。包含70000张0到9的图像，其中60000张标注为训练样本数据集，][https_yann.lecun.com_exdb_mnist_70000_0_9_60000]  
10000张为测试样本数据集。TensorFlow提供内建函数来访问它，MNIST手写体字库常用来进行图像识别训  
练。在机器学习中，提供验证样本数据集来预防过拟合是非常重要的，TensorFlow从训练样本数据集中留出  
5000张图片作为验证样本数据集。这里展示使用Python访问数据的方式：

from tensorflow.examples.tutorials.mnist import input_data
    mnist = input_data.read_data_sets("MNIST_data/"," one_hot=True)
    print(len(mnist.train.images))
    55000
    print(len(mnist.test.images))
    10000
    print(len(mnist.validation.images))
    5000
    print(mnist.train.labels[1,:]) # The first label is a 3'''
    [ 0. 0. 0. 1. 0. 0. 0. 0. 0. 0.]

5.垃圾短信文本数据集（Spam-ham text data）。通过以下方式访问垃圾短信文本数据：

import requests
    import io
    from zipfile import ZipFile
    zip_url = 'http://archive.ics.uci.edu/ml/machine-learningdatabases/
    00228/smsspamcollection.zip'
    r = requests.get(zip_url)
    z = ZipFile(io.BytesIO(r.content))
    file = z.read('SMSSpamCollection')
    text_data = file.decode()
    text_data = text_data.encode('ascii',errors='ignore')
    text_data = text_data.decode().split(\n')
    text_data = [x.split(\t') for x in text_data if len(x)>=1]
    [text_data_target, text_data_train] = [list(x) for x in zip(*text_
    data)]
    print(len(text_data_train))
    5574
    print(set(text_data_target))
    { 'ham', 'spam'}
    print(text_data_train[1])
    Ok lar... Joking wif u oni...

6.影评样本数据集。此样本数据集是电影观看者的影评，分为好评和差评，可以在网站  
[http://www.cs.cornell.edu/people/pabo/movie-review-data/下载。这里用Python进行数据处理，使用方式如下：][http_www.cs.cornell.edu_people_pabo_movie-review-data_Python]

import requests
    import io
    import tarfile
    movie_data_url = 'http://www.cs.cornell.edu/people/pabo/moviereview-
    data/rt-polaritydata.tar.gz'
    r = requests.get(movie_data_url)
    # Stream data into temp object
    stream_data = io.BytesIO(r.content)
    tmp = io.BytesIO()
    while True:
    s = stream_data.read(16384)
    if not s:
    break
    tmp.write(s)
    stream_data.close()
    tmp.seek(0)
    # Extract tar file
    tar_file = tarfile.open(fileobj=tmp, mode="r:gz")
    pos = tar_file.extractfile('rt'-polaritydata/rt-polarity.pos')
    neg = tar_file.extractfile('rt'-polaritydata/rt-polarity.neg')
    # Save pos/neg reviews (Also deal with encoding)
    pos_data = []
    for line in pos:
    pos_data.append(line.decode('ISO'-8859-1').
    encode('ascii',errors='ignore').decode())
    neg_data = []
    for line in neg:
    neg_data.append(line.decode('ISO'-8859-1').
    encode('ascii',errors='ignore').decode())
    tar_file.close()
    print(len(pos_data))
    5331
    print(len(neg_data))
    5331
    # Print out first negative review
    print(neg_data[0])
    simplistic , silly and tedious .

7.CIFAR-10图像数据集。此图像数据集是CIFAR机构发布的8亿张彩色图片（已标注为，32×32像素）的  
子集，总共分10类，60000张图片。50000张图片训练数据集，10000张测试数据集。由于这个图像数据集数  
据量大，并在本书中以多种方式使用，后面到具体用时再细讲，访问网址  
为：[http://www.cs.toronto.edu/~kriz/cifar.html。][http_www.cs.toronto.edu_kriz_cifar.html]  
8.莎士比亚著作文本数据集（Shakespeare text data）。此文本数据集是古登堡数字电子书计划提供的免  
费电子书籍，他们编译了莎士比亚所有著作。用Python访问文本文件的方式如下：

import requests
    shakespeare_url = 'http://www.gutenberg.org/cache/epub/100/pg100.
    txt'
    # Get Shakespeare text
    response = requests.get(shakespeare_url)
    shakespeare_file = response.content
    # Decode binary into string
    shakespeare_text = shakespeare_file.decode('utf-8')
    # Drop first few descriptive paragraphs.
    shakespeare_text = shakespeare_text[7675:]
    print(len(shakespeare_text)) # Number of characters
    5582212

9.英德句子翻译样本集。此数据集由Tatoeba（在线翻译数据库）发布，[ManyThings.org][]（[http://www.manythings.org][http_www.manythings.org]）整理并提供下载。这里提供英德语句互译的文本文件（你可以  
通过改变URL，使用你需要的任何语言的文本文件），使用方式如下：

import requests
    import io
    from zipfile import ZipFile
    sentence_url = 'http://www.manythings.org/anki/deu-eng.zip'
    r = requests.get(sentence_url)
    z = ZipFile(io.BytesIO(r.content))
    file = z.read('deu.txt''')
    # Format Data
    eng_ger_data = file.decode()
    eng_ger_data = eng_ger_data.encode('ascii''',errors='ignore''')
    eng_ger_data = eng_ger_data.decode().split(\n''') eng_ger_data = [x.split(\t''') for x in eng_ger_data if len(x)>=1]
    [english_sentence, german_sentence] = [list(x) for x in zip(*eng_
    ger_data)]
    print(len(english_sentence))
    137673
    print(len(german_sentence))
    137673
    print(eng_ger_data[10])
    ['I won!, 'Ich habe gewonnen!']

[https_yann.lecun.com_exdb_mnist_70000_0_9_60000]: https://yann.lecun.com/exdb/mnist/%E3%80%82%E5%8C%85%E5%90%AB70000%E5%BC%A00%E5%88%B09%E7%9A%84%E5%9B%BE%E5%83%8F%EF%BC%8C%E5%85%B6%E4%B8%AD60000%E5%BC%A0%E6%A0%87%E6%B3%A8%E4%B8%BA%E8%AE%AD%E7%BB%83%E6%A0%B7%E6%9C%AC%E6%95%B0%E6%8D%AE%E9%9B%86%EF%BC%8C
[http_www.cs.cornell.edu_people_pabo_movie-review-data_Python]: http://www.cs.cornell.edu/people/pabo/movie-review-data/%E4%B8%8B%E8%BD%BD%E3%80%82%E8%BF%99%E9%87%8C%E7%94%A8Python%E8%BF%9B%E8%A1%8C%E6%95%B0%E6%8D%AE%E5%A4%84%E7%90%86%EF%BC%8C%E4%BD%BF%E7%94%A8%E6%96%B9%E5%BC%8F%E5%A6%82%E4%B8%8B%EF%BC%9A
[http_www.cs.toronto.edu_kriz_cifar.html]: http://www.cs.toronto.edu/~kriz/cifar.html%E3%80%82
[ManyThings.org]: http://ManyThings.org
[http_www.manythings.org]: http://www.manythings.org