Variables and Data types in R Language

R- Variables

A Named storage that can be used by our program.

A Variable can be assigned value in three ways:

• var_name <- Value                   # leftward operator
• var_name = value                     # assignment operator
• var_value -> Variables_name   # rightward operator

To see the data type of a variable we use class( ) function.

To see the list of variables we use ls( ) function.

To delete a variable we use rm( ) function.

R- Data types

When we create some variable in a memory, then it is stored according to the value inside that variable.

Based on the type of value the memory is allocated.

Following are the basic Data Types:

• Vectors : a combination of values.
• List : Can contain many different type of objects.
• Matrices : A two dimensional Data Set.
• Arrays : Multi-dimensional Data Set.
• Factors : Factors store Vectors along with labels.
• Data Frames : Tabular Data objects, can have multiple types.