Six kinds of basic data types
numaric such as 12, 12.4
integer such as 2L, 0L
complex real and imaginary comprising the 3 + 2i
character in double or single quotes comprising up as "a", "good"
logical 如 TRUE，FALSE
raw is able to directly identify the type of computer, it is stored in the form of binary data
NULL represents the null value
NA represents a missing value
Data type objects advanced R
Vector R & lt objects using C () function, which means that the elements are combined into a vector
List R & lt objects which can contain many different types of elements, such as a vector, wherein the function list even further
matrix of two-dimensional rectangle data set
array
factor
data frame table data objects