说明：  、改写例程，编制用Fisher线性判别方法对三维数据求最优方向W的通用函数。 2、对下面表3-1样本数据中的类别ω1和ω2计算最优方向W。 3、画出最优方向W的直线，并标记出投影后的点在直线上的位置
(Rewriting routine, the preparation of Fisher linear discriminant method using three-dimensional data on the direction of seeking the best general-purpose function of W. 2, for the following sample data in Table 3-1 in the categories of ω1 and ω2 to compute the optimal direction of W. 3, draw the best straight line the direction of W, and mark out the projection of the points in a straight line after the location of)