出的结果还是非面板的结果,应该是建立返回回归向量的公式有问题,报错如下
Error in pdim.default(index[[1]], index[[2]]) :
duplicate couples (id-time) In addition: Warning messages:
1: In pdata.frame(data, index) :
duplicate couples (id-time) in resulting pdata.frame
to find out which, use e.g. table(index(your_pdataframe), useNA = "ifany")
2: In is.pbalanced.default(index[[1]], index[[2]]) :
duplicate couples (id-time)
3: In is.pbalanced.default(index[[1]], index[[2]]) :
duplicate couples (id-time)