数据说明:数据一共包含96861条记录,有id,x,y三个变量。
代码超级简单(写得也不好):
twoway (scatter x y if id==2, mlcolor(black*0) mfcolor(grey*0) msymbol(0)) ///
(scatter x y if id==1, mlcolor(black) mfcolor(grey) msymbol(0) msize(tiny)) ///
(scatter x y if id==15, mlcolor(black*0.15) mfcolor(grey*0.15) msymbol(0) msize(vtiny)) ///
(scatter x y if id==16, mlcolor(black*0.25) mfcolor(grey*0.25) msymbol(0) msize(vtiny)) ///
(scatter x y if id==48, mlcolor(black*0.60) mfcolor(grey*0.60) msymbol(0) msize(vtiny)) ///
(scatter x y if id==56, mlcolor(black*0.85) mfcolor(grey*0.85) msymbol(0) msize(vtiny)) ///
, legend(off)