跟crackman读SAS程序（86）--如何读取区间数据

shiyiming

From crackman's blog on Baidu


               
                <p>data temp;<br>
&nbsp;&nbsp;&nbsp;  do group=1 to 3;/*先创建一个数据集，包括group和no两个变量*/<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  do no=1 to 10;<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  output;<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  end;<br>
&nbsp;&nbsp;&nbsp;  end;<br>
run;<br>
data out;<br>
&nbsp;&nbsp;&nbsp;  do _n_=1 by 1 until(last.group);/*分组遍历变量NO，根据MOD函数判断输出观测对象，注意这里的BY分组变量，值得学习*/<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  set temp;<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  by group;<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  if mod(_n_,3)=1 then output;<br>
&nbsp;&nbsp;&nbsp;  end;<br>
run;</p>
<p>原程序在：<a href="http://mysas.net/forum/viewtopic.php?f=4&amp;t=6776"><!-- m --><a class="postlink" href="http://mysas.net/forum/viewtopic.php?f=4&amp;t=6776">http://mysas.net/forum/viewtopic.php?f=4&amp;t=6776</a><!-- m --></a></p> <a href="http://hi.baidu.com/crack%5Fman/blog/item/e7504f27cdba225d9922ed32.html">阅读全文</a>
               
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