Basics of Neural Network Programming

[Pages:45]Basics of Neural Network Programming

deeplearning.ai

Binary Classification

Binary Classification

Blue

Green

255 134 93 22

Red

255 13243 29042 2823 2

255 213213 49324 284234 1487 30

123 934 84334 172867 12932 124

34 434 1768677 2983232 13944 142

34 7667 28332 1294 94

67 83 194 202

1 (cat) vs 0 (non cat)

Andrew Ng

Notation

Andrew Ng

Basics of Neural Network Programming

deeplearning.ai

Logistic Regression

Logistic Regression

Andrew Ng

Basics of Neural Network Programming

deeplearning.ai

Logistic Regression cost function

Logistic Regression cost function

!" = % &!' + ) , where % *

=

" "#$+,

Given ('(.), !(.)),...,('(1), !(1)) , want !"(2) ! 2 .

Loss (error) function:

Andrew Ng

Basics of Neural Network Programming

deeplearning.ai

Gradient Descent

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