Dear All: Now I am writing program in delphi , found it is very convenience to do anova, T-test, F-Test, etc in R , how to call R in delphi? Thsnks. Best Regards YiYao Jiang Product Division/ product Testing Department Semiconductor Manufacturing International Corporation ZhangJiang Road, PuDong New Area, Shanghai ZIP: 201203 Tel:86-21-5080-2000 Ext. 15173