如题，在用matlab进行LM进行检验时，出现如下错误，请各位大神指点是什么问题？Error using  *
Inner matrix dimensions must agree.

Error in lmlag (line 47)
lm1 = (e'*W*y)/epe;

Error in demoLMsarsem_panel (line 43)
lm1=lmlag(y,[xconstant x],W);