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Module 3#

Intuition behind cost function#

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Linear Regression#

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Stochastic Gradient Decent#

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Logistic vs Linear Regression#

Linear is used to predict continuous numbers (Numerical) whereas the Logistic regression is used to predict a categorical value.
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Logistic regression#

  • A logistic function

Sigmoid Function#

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- It takes a real value and outputs a value between 0 and 1
- Maps input horizon to a bounded symmetrical output range
- Examples
- Logistic Function
- Hyperbolic Tangent
- Conditional probability of a random variable can be a sigmoid function

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