## R Introduction: Part II

BEGINNER

#R

Author: Oleksandr Lomako

Course description

In the second part of R Introduction, you will learn about multi-dimensional built-in structures, such as matrices, data frames, and lists.

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Matrices

In the first section, you will learn the two-dimensional structure that is widely used in math. In R, this data type is used not only for math purposes but also has many real-life purposes.

What is a Matrix?

matrix() Function

Transposing

Matrix Indexation

Namings

Operation with Matrices

Challenge

Data Frames

In the second section, you will learn data frames - an 'upgraded' version of the matrix. Unlike matrix, the data frame may contain data of different types. Most real-life tables can be represented as data frames. You will learn how to create/manipulate data frames and extract necessary data.

What is a Data Frame?

data.frame() Function

Columns Accessors

Logical Indexing

Manipulating Columns

Manipulating Rows

Challenge

Lists

In the final section, you will learn the lists in R. This data type works as vectors but may contain data of different types.

What is a List?

Namings

Extracting List Elements

Modifying