56 Logistic Regression: Classification With a Probability

You want to predict yes or no. Spam or not spam. Sick or healthy. Fraud or legit. That's a classification problem. And despite its confusing name, logistic regression is one of the best tools for it. It doesn't predict a number. It predicts a probability. Then it uses that probability to make a yes or no decision. Simple idea. Powerful in practice. What You'll Learn Here Why linear regression fails for classification What the sigmoid function does and why we need it How logistic regression makes