在SAS中的压缩数据集中创建连锁的zipcodes列表

Question

我需要创建一个zipcodes变量，它结合了字符串变量＆＃34; zip＆＃34;在每个城市的邮政编码的连锁列表中。这就是我到目前为止所拥有的：

data work.zip (drop=estimated_population zip);
    set work.clean;
    by state primary_city;
    length zipcodes $200;
    retain zipcodes;
    if first.primary_city then do;
    estcitpop=0;
    zipcodes= zip;
    end;
    else
    zipcodes=cats(zipcodes, ',', zip);
    estcitpop+estimated_population;
    if last.primary_city;
run;

这让我得到了正确的结果，但还有更好的方法吗？

Zips是字符值，需要保持这种状态。例如，如果对于休斯敦市，你有拉链12345,11345,11145和11115，我需要拉链码来阅读＆＃34; 12345,11345,11145,11115＆＃34;。

Answer 1

看起来很好。我会使用data work.zip ; do until (last.primary_city); set work.clean; by state primary_city; length zipcodes $200; zipcodes=catx(',',zipcodes, zip); estcitpop=sum(estcitpop,estimated_population); end; drop estimated_population zip; run; 函数和DOW循环来使其更简单。

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