求分组均值,然后画折线图,整个过程可以在preserve restore中
gcollapse (mean) mean_xx=xx,by(treat_fcm_new year) //求分组均值
twoway (line mean_xx year if treat_fcm_new == 0) ///
(line mean_xx year if treat_fcm_new == 1) //画折线图
求分组均值,然后画折线图,整个过程可以在preserve restore中
gcollapse (mean) mean_xx=xx,by(treat_fcm_new year) //求分组均值
twoway (line mean_xx year if treat_fcm_new == 0) ///
(line mean_xx year if treat_fcm_new == 1) //画折线图