为什么我的核密度这么高呀，有什么解决办法嘛



绘图代码如下
use "us安慰剂检验3.dta" ,clear
// 系数和 p 值结合   keep coef1 se1 pvalue1

#delimit ;
twoway (scatter pvalue1 coef1)(kdensity coef1, yaxis(2)),
xline( 0.0957363, lc(black*0.5) lp(dash))
xline(0, lc(black*0.5) lp(solid))
yline(0.000, lc(black*0.5) lp(dash))
xlabel(-0.1(0.01)0.1)
xtitle("Estimator", size(*0.8)) xlabel(, format(%4.1f) labsize(small))
ytitle("P Value", size(*0.8)) ylabel(, nogrid format(%4.1f) labsize(small))
ytitle("Density", size(*0.8) axis(2)) ylabel(, nogrid format(%4.1f) labsize(small) axis(2))
legend(r(1) order(1 "P Value" 2 "Estimator"))
graphregion(color(white)) ;
#delimit cr