可以用if语句限制,参考命令:
kdensity EC if year==2004 & EC>0.8 & EC<1.5, addplot((kdensity EC if year==2009 & EC>0.8 & EC<1.5) (kdensity EC if year==2012 & EC>0.8 & EC<1.5) (kdensity EC if year==2015 & EC>0.8 & EC<1.5) (kdensity EC if year==2019 & EC>0.8 & EC<1.5)) kernel(gaussian) legend(label(1 year2004)label(2 year2009)label(3 year2012) label(4 year2015)label(5 year2019))
|