求助各位大佬!!刚开始学copula函数和r语言,看了一篇论文想复现一下。用BiCopSelect函数选出来的最优模型是frankcopula,但是我在用fitcopula函数拟合的时候要么报错找不到fitcopula函数,要么就是Error in fitCopula.ml(copula, u = data, method = method, start = start, :
'start' contains NA values
这个start是啥啊?我看给的代码例子中好像都没写这一项啊?
> fitcop <- fitCopula(ellipCopula("t", dim = 2), copuladata,method = "mpl")
Error in fitCopula.ml(copula, u = data, method = method, start = start, :
'start' contains NA values
> summary(fitcop)
Error in h(simpleError(msg, call)) :
error in evaluating the argument 'object' in selecting a method for function 'summary': object 'fitcop' not found
>
恳请大家指点一下!!


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