这确实与参数的设置有关，一般默认情况下只输出特征根大于1的因子。要想输出任意个因子，则需要在对话框中进行相应的设置，

具体的操作过程:

Analyze--Date Reduction--Factor--Extraction －选中   “Number of   factors ” 并在其后面的方框中输入要输出的因子个数 （如：5）－－continue

[此贴子已经被作者于2008-1-8 23:48:32编辑过]

Example

FACTOR VARIABLES=V1 TO V12
/CRITERIA=FACTORS(6)
/EXTRACTION=PC
/ROTATION=NOROTATE
/PLOT=ROTATION.

.This example analyzes all variables between and including V1 and V12 in the working
data file.
• Six factors are extracted using the default principal components method, and the factor
pattern matrix is not rotated.
• PLOT sends all extracted factors to the graphics editor and shows a 3-D plot of the first three
factors.