In line with Anglo-Saxon tradition, R uses decimal points instead of commas. A common mistake for people coming from other traditions is to type `1,62 * 34,56`. This ...

if we give my_vector a `dim` attribute? Let's give it a try. Type dim(my_vector) <- c(4, 5). allows you to get OR set the `dim` attribute for an R object. In this case, we assigned the value c(4, 5) ...