Sorry for ask this question again. I have find the answer.Thank you for your attention! ----- 违背命运的人，永远不可能了解自己。 -- View this message in context: http://n4.nabble.com/How-to-fit-BEKK-model-with-R-tp1835987p1836137.html Sent from the Rmetrics mailing list archive at Nabble.com.