Coursera, Deep Learning 1, Neural Networks and Deep Learning - week2, Neural Networks Basics
Logistic regression
Cost function for logistic regression
Gradient Descent
接下来主要讲 Vectorization
Logistic Regression 的向量实现
Vectorizing LR Gradient output
Python/Numpy and Jupyter Notebook
上图中 axis=0 表示竖直方向，axis=1 是水平方向
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