变量之间存在相关吧?好像是说某一列或行可以用一个常数*另外的列或行表示出来,这样子?
http://talkstats.com/showthread.php?t=5180
这个里面给的解决方法是:
i) remove variable with zero standard deviation( constant value for all records)
ii) Remove multicollinearity(high). May be two variables are perfectly correlated, like, one variable may be derived variable of other one.