请教 - Stata专版 - 经管之家

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收藏 2008-08-23

请教各位高手一个问题&gt;<table cellspacing="0" cellpadding="0" width="216" border="0" style="WIDTH: 162pt; BORDER-COLLAPSE: collapse;"><colgroup><col span="3" width="72" style="WIDTH: 54pt;"></col></colgroup><tbody><tr height="19" style="HEIGHT: 14.25pt;"><td width="72" height="19" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 54pt; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent;">X1</td><td width="72" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 54pt; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;">X2</td><td width="72" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 54pt; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;">X3</td></tr><tr height="19" style="HEIGHT: 14.25pt;"><td align="right" height="19" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent;">1</td><td align="right" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;">3</td><td align="right" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;">1</td></tr><tr height="19" style="HEIGHT: 14.25pt;"><td align="right" height="19" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent;">3</td><td align="right" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;">1</td><td align="right" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;">2</td></tr><tr height="19" style="HEIGHT: 14.25pt;"><td align="right" height="19" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent;">4</td><td align="right" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;">2</td><td align="right" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;">1</td></tr><tr height="19" style="HEIGHT: 14.25pt;"><td align="right" height="19" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent;">6</td><td align="right" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;">3</td><td align="right" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;">2</td></tr><tr height="19" style="HEIGHT: 14.25pt;"><td align="right" height="19" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent;">6</td><td align="right" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;">4</td><td align="right" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;">1</td></tr><tr height="19" style="HEIGHT: 14.25pt;"><td align="right" height="19" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent;">2</td><td align="right" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;">6</td><td align="right" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;">2</td></tr></tbody></table>现在,我想得到如下结果：以X3进行分组的前提下，计算出各组的（X2的总和）/（X1的总和）。如何在STATA中实现。可以放在公式中继续参加计算的求和函数是啥？不知我说清了没。急用，谢谢各位了！