Fig. 11From: Applying compressive sensing to TEM video: a substantial frame rate increase on any cameraAn illustration of principal components analysis. The data points are described by an ellipse centered at the mean ฮผ of the data. The orientation of the ellipse is determined by the principal vectors v 1,v 2, and the radii are determined by principal values ฯ 1,ฯ 2. The principal values also represent the distance of one standard deviation from the meanBack to article page