Andrew-Coursera-DL课程-笔记part1-1（Neural Networks Basics）
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Logistic Regression as a Neural Network
- Binary Classification
- Logistic Regression
Logistic Regression Cost Function
loss function指一个数据的损失
cost function指整个数据集的损失Gradient Descent
Derivatives
Derivatives with a Computation Graph
Logistic Regression Gradient Descent
- Gradient Descent on m Examples
Python and Vectorization
Vectorization
More Vectorization Examples
- Vectorizing Logistic Regression
- Vectorizing Logistic Regression’s Gradient Output
- Broadcasting in Python
···
x1 = np.array([3,4,5])print x1+5[ 8 9 10]- A note on python/numpy vectors
python中(m,n)+(1,n)==(m,n)+(m,n) - Explanation of logistic regression cost function
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