Logistic Regression From Scratch: the Same Gradient Descent, Squashed Through a Sigmoid

📰 Dev.to · Devanshu Biswas

Learn to implement logistic regression from scratch using gradient descent and a sigmoid function to predict probabilities

intermediate Published 14 Jun 2026
Action Steps
  1. Build a linear regression model from scratch
  2. Apply a sigmoid function to the output to predict probabilities
  3. Implement gradient descent to optimize the model
  4. Configure the model to handle binary classification problems
  5. Test the model using a dataset and evaluate its performance
Who Needs to Know This

Data scientists and machine learning engineers benefit from understanding logistic regression to build accurate classifiers, and software engineers can apply this knowledge to develop predictive models

Key Insight

💡 Logistic regression is linear regression with a sigmoid function to predict probabilities, using the same gradient descent form

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📈 Build logistic regression from scratch with gradient descent and sigmoid!
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