garchFit(cond.dist = c("dnorm", "dsnorm", "dstd", "dsstd", "dged", "dsged"),
skew = 0.9, shape = 4, include.skew = NULL, include.shape = NULL, ...)
请问各位，SKEW=0.4,以及SHAPE=4是根据样本本身的偏度和峰度所设定的还是说这个是随意设定的？