The second PC is or thogonal to the first PC and is constructed through the center point of the cloud (see Fig. 2a ), if we work on .column-centered data. Fig. 2b shows the same data in what we will call the (unnormalised) PC space: the structure in the data remains the same, only the axes are rotated in the direction of the largest variance within the
data. The points on the new axes now represent the scores of each object on PC and PC