问题描述
我正在尝试在piecewiseSEM包中使用与psem交互的术语，但出现以下错误：
lme(response1 ~ predictor1 * predictor2,data),lme(response2 ~ predictor1 * predictor2,...)```
lme is in the nlme package
predictor1 is an integer of 7 levels
predictor2 is a factor of 2 levels
The model alone runs fine outside of psem,though. I Could not find a reference as to why interaction terms will not work in the function psem.
I appreciate any insights on this. Thanks!
解决方法
更新：
此 SEM 仅在 predictor2 为整数时才有效