December 2018
Intermediate to advanced
274 pages
7h 46m
English
Content preview from Machine Learning for Mobile
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Logistic regression
Logistic regression is a classification algorithm that is best suited to when the output to be predicted is a binary type—true or false, male or female, win or loss, and so on. Binary type means only two outcomes are possible.
The logistic regression is so called because of the sigmoid function used by the algorithm.
A logistic function or logistic curve is a common S shape (sigmoid curve), depicted by the following equation:
In the preceding equation, the symbols have the following meanings:
- e: The natural logarithm base (also known as Euler's number)
- x0: The x-value of the sigmoid's midpoint
- L: The curve's maximum value ...
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