[null,null,["最后更新时间 (UTC):2024-07-22。"],[[["Data needs to be prepared through normalization, scaling, and transformation before using it for clustering."],["A similarity metric is crucial for clustering algorithms as it quantifies how similar data points are to each other."],["The k-means algorithm is employed in this course to group data based on the defined similarity metric."],["Evaluating and adjusting clustering outcomes is an iterative process involving reviewing cluster quality and individual data point assignments."]]],[]]