R Introduction: Part I

R Introduction: Part I

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1. Basic Syntax and Operations

In the initial section, you’ll dive into the foundational elements of R, such as generating output and performing elementary operations. This section will conclude with an exploration of the theory behind variables.

Basic Arithmetic

Using the print() Function

Integer Division and Remainders

Revenue Calculation

Assignment Operators

2. Basic Data Types and Vectors

You’ll become familiar with the vector class in R, which also handles individual values. Here, you’ll delve into the primary data types for singular values and learn how to manage multiple values of the same type simultaneously.

Type Conversion

Labeling Vectors

Indexing in Vectors

Modifying Vectors

Deleting Elements from Vectors

Arithmetic Operations with Vectors

3. Factors

Factors, also known as categorical variables, are prevalent in the real world. Examples include blood types, currencies, nationalities, and brands. Unlike numerical variables, factors have a limited set of possible values.

What is a Factor?

Indexing in Factors

Counting Values

Grouping Numeric Data

Using the print() Function

After running the code in the previous chapter, you may have noticed [1] preceding the results. This is R's way of indicating that the line starts with the first element in your output. As you progress through the course, you'll encounter outputs with multiple elements.

Let's say we want to carry out a division operation:

As we already know, in R, it's unnecessary to use a specific function to display output values. However, if your goal is to round a number to a desired number of significant figures, you can use the print() function, which you may also recognize from other programming languages.

Here's how you use the function:

For instance, we can round the division result from our previous example to three significant figures:

As demonstrated, the output of the expression has been rounded to three significant figures.

Task

On the first line, execute a division of 50 by 7.
On the second line, divide 50 by 7 again, but this time round the result to four significant figures using the print() function.

Everything was clear?

Section 1. Chapter 3

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Course Content

R Introduction: Part I

R Introduction: Part I

Using the print() Function

After running the code in the previous chapter, you may have noticed [1] preceding the results. This is R's way of indicating that the line starts with the first element in your output. As you progress through the course, you'll encounter outputs with multiple elements.

Let's say we want to carry out a division operation:

As we already know, in R, it's unnecessary to use a specific function to display output values. However, if your goal is to round a number to a desired number of significant figures, you can use the print() function, which you may also recognize from other programming languages.

Here's how you use the function:

For instance, we can round the division result from our previous example to three significant figures:

As demonstrated, the output of the expression has been rounded to three significant figures.

Task

On the first line, execute a division of 50 by 7.
On the second line, divide 50 by 7 again, but this time round the result to four significant figures using the print() function.

Everything was clear?

Section 1. Chapter 3

toggle bottom row

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