Can someone help me with calculating Stochastic Volatility (of stocks and options) using SAS or R or Matlab please? I am new to SAS and I am trying to use Heston model, White-Hull model or any other suitable model but have no idea how to do this in SAS/ R/Matlab. Any help, any codes, any tips, any warnings are all welcome. I am using FTSE data at the moment. Thank you in advance.