Logistic Regression

📘 Artificial Intelligence & Machine Learning Basics 👁 82 views 📅 Nov 05, 2025
⏱ Estimated reading time: 1 min

Definition:
A supervised learning algorithm used for classification problems, predicting the probability of a categorical outcome.

Key Points:

  • Predicts 0 or 1 (binary) or multiple classes

  • Uses sigmoid function: σ(z)=1+ez1
  • Threshold (usually 0.5) decides the class

Applications:

  • Spam detection

  • Credit approval

  • Disease diagnosis

Advantages:

  • Simple, interpretable

  • Outputs probabilities

Limitations:

  • Not suitable for complex/non-linear relationships


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