Vectors
The fundamental R data structure is the vector, which stores an ordered set of values called elements. A vector can contain any number of elements. However, all the elements must be of the same type; for instance, a vector cannot contain both numbers and text.
There are several vector types commonly used in machine learning: integer
(numbers without decimals), numeric
(numbers with decimals), character
(text data), or logical
(TRUE
or FALSE
values). There are also two special values: NULL
, which is used to indicate the absence of any value, and NA
, which indicates a missing value.
It is tedious to enter large amounts of data manually, but simple vectors can be created by using the combine function c()
. The vector can also be given a name ...
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