statsby wam = r (mean), by (region) saving (wam,replace) : summ median_age [weight=pop],detail
(running summarize on estimation sample)
type mismatch
r(109);
出现这个提示,分别运行了几个程序,都没有问题,请教大神,这个是什么问题,附上原数据http://www.stata-press.com/data/r12/census12。