是这样的一个语句:tab flo_rage_1 [aw=wp] if childage_1<10 & childage_2<10 & twins==1
运行的时候出现了这样的错误:wp not found
r(111);
这是什么意思?求大神解答,谢谢
楼主: 阿ken哥
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回帖推荐wisdommingli 发表于2楼 查看完整内容 wp not found 就是加权变量wp没有被定义。
去掉[aw=wp]这个计算加权frequency的选项,除非特殊目的,一般不用。
aweights, or analytic weights, are weights that are inversely proportional to the variance of an observation; that is, the variance of the jth observation is assumed to be sigma^2/w_j, where w_j are the weights. Typically, the observations represent averages and the weights are the number ...
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