A basic understanding of data types and data structures and how to operate on those, allows you to write better and more efficient code. Note that everything in R is an object. A good conceptual understanding of objects is important because manipulation of objects is a very common task.

R has six atomic vector types (atomic means that the vector only holds data of a single type and vectors can be thought of as contiguous cells containing data).

Objects can have attributes, which include:

Note that more specialized R-objects, such as object referring to spatial data or time series data, among others, may have very different attributes.

R provides many functions to examine features of vectors and other objects, for example