It is shown that the number of selected independent rariables is less thanit is real one,because of multi-collinearity between independent variables.

• 本文对我国大坝变形资料分析中常用的逐步回归分析进行了探讨,指出这种方法通常所选的因子数偏少,其原因来自自变量之间的复共线性的影响。