四、相关分析在很多实际问题中,并不需要我们知道变量间的回归关系,而只需要了解变量间相关的密切程度和性质就够了。例如研究阿伯德多花黑麦草的单株有效分蘖枝x_1、穗粒数x_3、穗长x_2、穗重x_4、千粒重x_5等因子对其种籽产量的相关性及诸因子之间的相互关系,从而确定诸因子对种籽产量影响的相对重要性及影响种籽产量的 Fourth, the correlation analysis In many practical problems, does not require us to know the regression relationship between variables, but only need to understand the close correlation between variables and nature is enough. For example, the correlation between the seed yield and the correlation between various factors such as the effective tiller number x_1, the number of spikelets per plant x_3, the panicle length x_2, the panicle weight x_4, the 1000-grain weight x_5 of Abertalus ryegrass , So as to determine the relative importance of various factors on seed yield and affect seed yield