<P>在EVIEWS中打开一个组对象(Group)后，在组对象窗口的View下拉工具条中有Principal Componets项，我请问哪位大虾知道这个选项的功能是什么？</P>
<P>其在EVIEWS帮助中显示的内容“<FONT color=#f70909>The principal components view of the group</FONT> displays the Eugene-decomposition of the sample second moment of a group of series. Select View/Principal Components... to call up the dialog.”红色标记的部分，我估计是整句话的主语</P>