Dear all, There are n points in R^p, I want to sort th data like this, first sort the data by the first coordinate, and then partition the data in to several subsets, then in every subset, sort the data by the second coordinate, then partiotion...... In general, I want to partition the high dimension space in to little cubes, and put the points in to these cubes. Could anyone tell me how to do this ? best regards, WAN, SQ [[alternative HTML version deleted]]