试试这个:
_matplot e(LR21), columns(1 2) yline(7.3523, lpattern(dash)) recast(line) ytitle("Likelihood Ratio") xtitle("1st Threshold Parameter") name(LR213)
_matplot e(LR22), columns(1 2) yline(7.3523, lpattern(dash)) recast(line) ytitle("Likelihood Ratio") xtitle("2nd Threshold Parameter") name(LR223)
graph combine LR213 LR223, cols(1)


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