6.5.4 Quality of representation

The quality of representation of a point in the coordinate system, defined by the chosen numbers of dimensions, is defined as the ratio of the squared distance of the point from the origin in the chosen number of dimensions, over the squared distance from the origin in the space defined by the maximum number of dimensions. It is also equal to the sum of COS2 j .

Quality = COS2 j

A low quality means that the current number of dimensions does not represent well the respective column or row point.