Warning: | Ridging has failed to improve the loglikelihood. You may want to increase the initial ridge value (RIDGEINIT= option), or use a different ridging technique (RIDGING= option), or switch to using linesearch to reduce the step size (RIDGING=NONE), or specify a new set of initial estimates (INEST= option). |
Warning: | The LOGISTIC procedure continues in spite of the above warning. Results shown are based on the last maximum likelihood iteration. Validity of the model fit is questionable |
请问是什么原因造成的???
我用的是向后建模法:
proc logistic data = JM.train1 des;
model Y=&screened
/ selection=backward fast slstay=.001;
run;
所设Pr > ChiSq 是小于0.001的。可是结果却出来很多大于0.001的值;以下是结果报告:
是不是数据出现什么问题了呢?可是我在数据处理过程中严格按照老师所说的步骤进行的。请老师解答,急哦!