Grokking Machine Learning

6 A continuous approach to splitting points: Logistic classifiers

In this chapter

• the difference between hard assignments and soft assignments in classification models
• the sigmoid function, a continuous activation function
• discrete perceptrons vs. continuous perceptrons, also called logistic classifiers
• the logistic regression algorithm for classifying data
• coding the logistic regression algorithm in Python
• using the logistic classifier in Turi Create to analyze the sentiment of movie reviews
• using the softmax function to build classifiers for more than two classes

In the previous chapter, we built a classifier that determined if a sentence ...