kgbond 分析软件：sas 9.0 主要存在的问题：下图，为sas绘制的主成分1、2的二维载荷图，红色箭头表示一系列原始变量。 1.这些原始变量是根据什么绘制出来的？相关系数矩阵？ 2.教材上说此图可以反映原始变量间的空间关系，那具体应该如何解释？距离越近表示相关程度越大么？位于不同象限代表呈负相关么？
da_da_mao dimention 1 is the first principle component, which takes 50.1% of total variability dimention 2 is the second principle component, which takes 13.7% of the total variability PRIN1=beta1*AA+beta2*EXP+beta3*FL,....+betan*HON PRIN2=beta1*HFX+,....+betan*TX beta is the parameter estimate you can get the sign of betas ( + or -) from the projection of each variable line on x axis in each of the two above plots I think the lengths and the angles of the variable lines are some constraints on both dimensions.
