悬赏30论坛币求助各位，用SEM包分析时报错：The matrix is non-invertable

求助各位，用SEM包分析时报错：The matrix is non-invertable

> sem.dhp.1 <- sem(model.dhp.1,R.DHP,20)
Error in csem(model = model.description, start, opt.flag = 1, typsize = typsize,  :
  The matrix is non-invertable.


悬赏30论坛币，求助各位大神

样本多少？模型结构图？什么都没有？

这个应该是你输入路径时变量指向错误  一般在错误是由于specifyModel（）设定不全

错误案例：
> model.kerch <- specifyModel(
+ text = '
+       a -> b, a_b, NA
+       a -> c, a_c, NA
+       a -> d, a_d, NA
+       b -> d, b_d, NA
+       b -> c, b_c, NA
+       c -> d, c_d, NA
+ a -> a, a_a, NA
+ b -> b, b_b, NA
+ c -> c, c_c, NA
+ d -> d, d_d, NA
+ ')
Read 10 records
NOTE: it is generally simpler to use specifyEquations() or cfa()
      see ?specifyEquations
> out_sem <- sem(model.kerch, cor_num, nrow(dat))
Error in csem(model = model.description, start, opt.flag = 1, typsize = typsize,  :
  The matrix is non-invertable.
---------------------------------------------------
只需要将specifyModel  里后四行自己对自己的影响符号变为：<->

a <-> a, a_a, NA
      b <-> b, b_b, NA
      c <-> c, c_c, NA
      d <-> d, d_d, NA
修改后结果：

[img]C:\Users\Lenovo\Desktop\sem11[/img]