V2EX train-test-split

Train-test-split

释义 Definition

train-test split(训练-测试划分):机器学习中把数据集按一定比例分成训练集(用来训练模型)和测试集(用来评估模型在未见数据上的表现)的方法。常见比例有 80/20、70/30 等;有时还会另外划分验证集。(该术语也可写作 train/test splittraintest split。)

发音 Pronunciation (IPA)

/tren tst splt/

例句 Examples

We used a train-test split to evaluate the model.
我们使用训练-测试划分来评估这个模型。

After a stratified train-test split, the classifier achieved higher accuracy on the test set without changing the algorithm.
在进行分层的训练-测试划分之后,即使不更换算法,这个分类器在测试集上的准确率也提高了。

词源 Etymology

该词组由三个常用词组成:train(训练,指用数据拟合模型参数)、test(测试,指在未参与训练的数据上检验表现)、split(切分,指把整体数据分开)。作为机器学习术语,它随着统计学习与实践型数据科学工具的普及而广泛使用,强调“训练”和“评估”要在不同数据上进行,以减少对模型效果的误判。

相关词 Related Words

文学与著作 Literary Works

  • Hands-On Machine Learning with Scikit-Learn, Keras, and TensorFlow(Aurélien Géron)
  • Introduction to Machine Learning with Python(Andreas C. Müller & Sarah Guido)
  • The Elements of Statistical Learning(Trevor Hastie, Robert Tibshirani, Jerome Friedman)
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