Axis with largest range Find objects ( pivots ) whose distance is the largest Use the line joining them as an approximation for the axis with largest range   Corresponds to diameter of the dataset Choosing pivots   Cannot look at all distances, where m is the number of points in the dataset Randomly grab a point, say Find which is at the largest distance from Now, again find which is at the largest distance from Repeat until convergence or for a fixed number of steps Analysis   Convergence guaranteed only after steps   May not find the object pair with largest distance   Running time is for fixed number of steps