多元回归源代码。回归方式：配置为0表示进行多元线性回归；1进行多项式回归；2进行多元二次回归。变量/阶数：回归方式配置为0时表示参与回归的变量数，配置为1时表示回归的阶数；（默认待回归变量不超过6个或拟合阶数不超过6次）

-Multiple regression source code. Regression: Configure multiple linear regression　polynomial regression　2 multivariate quadratic regression. Variables/order: Regression, configured for 0:00 that the number of variables involved in regression, configuration 1:00 regression order　(the default Subject regression variables does not more than six or fitting the order of no more than 6 times)