2014年9月16日
Exercise : Self-Taught Learning
摘要： First, you will train your sparse autoencoder on an "unlabeled" training dataset of handwritten digits. This produces feature that are penstroke-like.... 阅读全文
posted @ 2014-09-16 17:04 老姨 阅读(302) 评论(0) 推荐(0)
Self-Taught Learning
摘要： the promise of self-taught learning and unsupervised feature learning is that if we can get our algorithms to learn from unlabeled data, then we can e... 阅读全文
posted @ 2014-09-16 16:26 老姨 阅读(530) 评论(0) 推荐(0)
Exercise : Softmax Regression
摘要： Step 0: Initialize constants and parametersStep 1: Load dataStep 2: Implement softmaxCostImplementation Tip: Preventing overflows - in softmax regress... 阅读全文
posted @ 2014-09-16 15:25 老姨 阅读(440) 评论(0) 推荐(0)
Softmax Regression
摘要： This model generalizes logistic regression to classification problems where the class label y can take on more than two possible values. Softmax regression is a supervised learning algorithm, but ... 阅读全文
posted @ 2014-09-16 10:27 老姨 阅读(338) 评论(0) 推荐(0)