[問題] SAS LOG Hessian 非正定 導致不能收斂的問題
跑SAS PROC GENMOD 時 , SAS LOG出現的
warning:the negative of the Hessian is not positive definite.
The convergebce is questionable.
warning:the procedure is continuing but the validity of the
model fit is questionable.
warning:the specified model did not converge.
warning:negative of Hessian not positive definite.
要怎麼解釋上面所出現的warning?
且為什麼非正定矩陣無法收歛?
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.128.194.210
※ pitt99:轉錄至看板 Math 05/01 13:38