Things under legendu
Many R functions have lots of arguments which allows you get a full control of their behaviors, so before you ask whether there is any R function which have a little different behavior from a R function you know, you’d better first check the arguments of the function you know.
Many R functions are generic functions (e.g.
plot,residuals,coef, etc), which means that they can be applied to different types of objects, and the behavior varies according to the type of objects.