尝试用portvrisk却发现我装的matlab没有这个function:
>> Portreturn=0.055; Portrisk=0.03571; Riskthreshold=0.01; Portvalue=1; ValueAtRisk=portvrisk(Portreturn,Portrisk,Riskthreshold,Portvalue)
Undefined function 'portvrisk' for input arguments of type 'double'.
请问怎么加portvrisk函数呢?
谢谢