能不能直接用T分布的分位数表啊,自由度知道的话?maybe it is. but as far as i can see, if you do such topic, you may need a lot of VaR forecasts. say 500, will you look at the table for 500 times and then compute the quantile by hand or calculator for 500 times? the same for GED.
难道一定要编程么?it depends on your situation. Probably so.