Question

What are the differences between t.test() and t.data.frame()? When do you use these two functions?

Answer 1

Due to the naming scheme of S3’s generic class, both functions are similar to one another. However, they are not related to each other. t.test() performs t-test and is generic in nature. t.data.frame() is called by the generic t() for transposing the input data. As a result of S3 dispatch rules, t.test() along with t() would get called when the latter is applied to the class “test”