说明：  投影寻踪方法是对研究变量乘以一个列向量矩阵，进行相应的线性变换，从而达到投影的目的。投影指标函数是用来衡量投影效果的一个标准，实现高维特征量的低维表示。对每一个投影方向都有一个目标值，用此目标值构造此方向的适应度函数，用遗传算法的操作来实现适应度高的投影方向之间的优化重组。
(Projection Pursuit method is the study variables multiplied by a column vector matrix corresponding linear transformation, so as to achieve the purpose of the projection. Projection index function is used to measure the projected effects of a standard, low-dimensional representation of high-dimensional feature. Has a target value for each projection direction, with this target value of the fitness function constructed in this direction, with the operation of the genetic algorithm to achieve the optimization and reorganization of the the high fitness projection direction.)