利用 xthreg命令进行门槛回归,绘图时提示: _matplot e(LR21), columns(1 2) yline(7.35,lpattern(dash)) connect(
> direct) msize(small) mlabp(0)mlabs(zero) ytitle("LR Statistics") xt
> itle("First Threshold") recast(line) name(LR21) nodraw
matrix should have at least 2 columns
r(198);
求大神指导,愿意支付20论坛币!