From the course: Artificial Intelligence Foundations: Machine Learning
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Determining feature importance
From the course: Artificial Intelligence Foundations: Machine Learning
Determining feature importance
- [Instructor] Which features from the housing dataset do you think are the most important? Write down the top three features and why you think they are important to predict the cost of a home, and we'll soon find out if you're right. Why are features so important? Feature importance is the process of finding the most important features to help predict a target. Each feature or column in your dataset impacts the final prediction. Some more than others. There are various ways to calculate feature importance today. We'll discuss feature importance for tree-based models. The overall goal of feature importance is to improve predictions and reduce the training time and overall cost by selecting the top features that have the most impact on the outcome. In our case, the cost of a home. After you understand feature importance, you retrain the model with the most important features. This gives you a less complex model to…
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