我有一个数据集，我想通过一个名为鱼类物种的小组查看我的t检验。我如何将其包含在代码中？
t.test(Delta.C.parasitef[Parasite.species =="Anilocra"],
DeltaC.parasitem[Parasite.species =="Anilocra"])
#In the above code I want to only look at the specified values belonging to a a
particular fish species, and I have 4 different ones.