The clip explains that PCA chooses which directions to keep based on the spread of the data. It uses a 2D scatter plot to show that projecting along the smaller-spread direction leaves the points separated, while projecting along the larger-spread direction collapses them.
Conditions: Demonstrated on a 2D scatter plot.; The explanation is geometric and intuitive rather than algebraic.
The clip explains that PCA chooses which directions to keep based on the spread of the data. It uses a 2D scatter plot to show that projecting along the smaller-spread direction leaves the points separated, while projecting along the larger-spread direction collapses them.
Conditions: Demonstrated on a 2D scatter plot.; The explanation is geometric and intuitive rather than algebraic.