duplex

代码说明：

  用于建模数据分集。计算各样本点的欧式距离，首先将距离最大的两个点放入第一个样本集，接着将余下距离最大的两个点放入第二个样本集，依次计算，将剩余数据点分别放入上述两个样本集。( This algorithm starts by selecting the two points furthest from each other (euclidean distance) and puts them both in a first set. Then the next two points furthest from each other are put in a second set, and the procedure is continued by alternatively placing pairs of points in the first or second set. For calibration applications, the second set can be the test set, and the calibration would be the concatenation of the first set plus the remaining samples.)