为什么会出现结构方程建模错误？

Question

为什么这个 SEM 不能运行？

> plot(c5 ~ TLDist, data = dat)
> abline(mod6, col=2, lwd=3)
> semdata <- cbind(c0, c1, c2, c3, c4, c5)
Error in cbind(c0, c1, c2, c3, c4, c5) : object 'c0' not found
> model1 <- 'c0 ~ c1
+     c1 ~ c2
+     c2 ~ c3
+     c3 ~ c4
+     c4 ~ c5
+     c5 ~ c0
+     c0 ~ c5'
> fit1 <- sem(model1, data = dat)
> lavaanPlot(name = "MODEL1", fit1, labels = semdata, coefs = TRUE)

<块引用>

lavaanPlot(name = "MODEL1", fit1, labels = semdata, coefs = TRUE) 中的错误： 找不到函数“lavaanPlot” semdata <- cbind(c1, c2, c3, c4, c5) cbind(c1, c2, c3, c4, c5) 中的错误：找不到对象“c1” semdata <- cbind(c1, c2, c3, c4, c5) cbind(c1, c2, c3, c4, c5) 中的错误：找不到对象“c1”