!逐步回归分析程序：

　　! M：输入变量，M=N+1，其中N为自变量的个数；M包括的因变量个数

　　! K：输入变量，观测点数；

　　! F1：引入因子时显著性的F-分布值；

　　! F2：剔除因子时显著性的F-分布值；

　　! XX：存放自变量和因变量的平均值；

　　! B：存放回归系数；

　　! V：存放偏回归平方和和残差平方和Q；

　　! S：存放回归系数的标准偏差和估计的标准偏差；

　　! C：存放复相关系数；

　　! F：存放F-检验值；-! Stepwise regression analysis procedure:! M: input variables, M = N+ 1, in which N is the number of independent variables　M, including the number of the dependent variable! K: input variables, observation points ! F1: when to introduce a significant factor of the F-distribution value ! F2: remove significant factor when the F-distribution value ! XX: storage self-variables and the dependent variable on average ! B: regression coefficient storage ! V: store partial regression sum of squares and residual sum of squares Q ! S: storage of the standard deviation of regression coefficients and the estimated standard deviation ! C: storage of multiple correlation coefficient ! F: storing F-test value