Coursera, Deep Learning 1, Neural Networks and Deep Learning - week2, Neural Networks Basics

时间:2023-03-08 21:59:50

Logistic regression

  Coursera, Deep Learning 1, Neural Networks and Deep Learning - week2, Neural Networks Basics

Cost function for logistic regression

  Coursera, Deep Learning 1, Neural Networks and Deep Learning - week2, Neural Networks Basics

Gradient Descent

  Coursera, Deep Learning 1, Neural Networks and Deep Learning - week2, Neural Networks Basics

  Coursera, Deep Learning 1, Neural Networks and Deep Learning - week2, Neural Networks Basics

  Coursera, Deep Learning 1, Neural Networks and Deep Learning - week2, Neural Networks Basics

  Coursera, Deep Learning 1, Neural Networks and Deep Learning - week2, Neural Networks Basics

  Coursera, Deep Learning 1, Neural Networks and Deep Learning - week2, Neural Networks Basics

接下来主要讲 Vectorization

  Coursera, Deep Learning 1, Neural Networks and Deep Learning - week2, Neural Networks Basics

Logistic Regression 的向量实现  

Coursera, Deep Learning 1, Neural Networks and Deep Learning - week2, Neural Networks Basics

  Coursera, Deep Learning 1, Neural Networks and Deep Learning - week2, Neural Networks Basics

Vectorizing LR Gradient output

  Coursera, Deep Learning 1, Neural Networks and Deep Learning - week2, Neural Networks Basics

Python/Numpy and Jupyter Notebook

  

  Coursera, Deep Learning 1, Neural Networks and Deep Learning - week2, Neural Networks Basics

上图中 axis=0 表示竖直方向,axis=1 是水平方向