谁说的作图命令是
matplot？？？

你好，我也是初学，很多不懂之处，请多多指教。我现在把王老师的程序贴出来，希望得到解答：
Examples

    Setup
        . use hansen1999
    Estimate a single-threshold model
        . xthregi q1 q2 q3 d1 qd1, rx(c1) qx(d1) thnum(1) trim(0.01) grid(400) bs(300)
    Estimate a triple-threshold model given the estimated result above
        . xthregi q1 q2 q3 d1 qd1, rx(c1) qx(d1) thnum(3) trim(0.01 0.01 0.05) bs(0 300 300) thgiven
        . xthregi q1 q2 q3 d1 qd1, rx(c1) qx(d1) thnum(3) trim(0.01 0.01 0.05) grid(400) bs(300 300 300)

    Estimate a triple-threshold model directly
        . xthregi q1 q2 q3 d1 qd1, rx(c1) qx(d1) thnum(3) trim(0.01 0.01 0.05) bs(300 300 300)
绘图：
    Plot the confidence interval using likelihood-ratio (LR) statistics
        . _matplot e(LR21), columns(1 2) yline(7.35, lpattern(dash)) connect(direct) msize(small) mlabp(0) mlabs(zero) ytitle("LR Statistics") xtitle("First Threshold") recast(line) name(LR21) nodraw
        . _matplot e(LR22), columns(1 2) yline(7.35, lpattern(dash)) connect(direct) msize(small) mlabp(0) mlabs(zero) ytitle("LR Statistics") xtitle("Second Threshold") recast(line) name(LR22) nodraw
        . graph combine LR21 LR22, cols(1)

Author
Qunyong Wang
    Institute of Statistics and Econometrics
Nankai University
    Tianjin, China
    QunyongWang@outlook.com

_matplot

人家的下画线为什么不要了呢

哈哈，原来是这样，谢谢谢谢！！

我设置了一个门槛值，现在又出现 这个问题。这是？
. _matplot e(LR21), columns(1 2) yline(7.35, lpattern(dash)) connect(direct) msize(small) mlabp(0) mlabs(zero) ytitle("LR Statistics") xtitle
> ("First Threshold") recast(line) name(LR21) nodraw
matrix should have at least 2 columns
r(198);