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R Introduction: Part I
course content

Course Content

R Introduction: Part I

R Introduction: Part I

1. Basic Syntax and Operations
Why R?Basic ArithmeticUsing the print() Function Comments in RInteger Division and RemaindersExponentiationcat() FunctionVariablesRevenue CalculationAssignment Operators
2. Basic Data Types and Vectors
Data TypesNumbersType ConversionLogical TypesVectorsLabeling VectorsIndexing in VectorsModifying VectorsDeleting Elements from VectorsArithmetic Operations with Vectors
3. Factors
What is a Factor?Indexing in FactorsLevelsCounting ValuesGrouping Numeric DataGrades Summary

Variables

Saving and reusing data effectively in programming often requires the use of variables.

To ensure clear and error-free programming, certain rules must be followed when naming variables. Here are some guidelines:

  • Variable names must not start with a number or with a period followed by a number;
  • They should not include the % symbol;
  • They must not begin with an underscore _;
  • They can start with a period if it is not followed by a number.

Choosing meaningful variable names is considered best practice. For instance, naming a variable year to store the value 2020 is more intuitive than using nondescript names like a or b. While this isn't mandatory, it significantly enhances code readability for both the author and others.

To assign a value to a variable, the assignment operator = is used. For example, year = 2020 assigns the value 2020 to the variable named year:


              
12

            
year = 2020
cat(year)
copy

Task

Regarding the deposit task, let's assign the relevant data to variables using the assignment operator:

  1. Assign the initial amount of money, 2000, to the variable named initial_money.
  2. Assign the interest rate, 13, to the variable named interest_rate.
  3. Assign the number of years, 4, to the variable named n_years.
  4. Use the cat() function to display the values of initial_money, interest_rate, and n_years in the order they were created.

Task

Regarding the deposit task, let's assign the relevant data to variables using the assignment operator:

  1. Assign the initial amount of money, 2000, to the variable named initial_money.
  2. Assign the interest rate, 13, to the variable named interest_rate.
  3. Assign the number of years, 4, to the variable named n_years.
  4. Use the cat() function to display the values of initial_money, interest_rate, and n_years in the order they were created.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Section 1. Chapter 8
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Variables

Saving and reusing data effectively in programming often requires the use of variables.

To ensure clear and error-free programming, certain rules must be followed when naming variables. Here are some guidelines:

  • Variable names must not start with a number or with a period followed by a number;
  • They should not include the % symbol;
  • They must not begin with an underscore _;
  • They can start with a period if it is not followed by a number.

Choosing meaningful variable names is considered best practice. For instance, naming a variable year to store the value 2020 is more intuitive than using nondescript names like a or b. While this isn't mandatory, it significantly enhances code readability for both the author and others.

To assign a value to a variable, the assignment operator = is used. For example, year = 2020 assigns the value 2020 to the variable named year:


              
12

            
year = 2020
cat(year)
copy

Task

Regarding the deposit task, let's assign the relevant data to variables using the assignment operator:

  1. Assign the initial amount of money, 2000, to the variable named initial_money.
  2. Assign the interest rate, 13, to the variable named interest_rate.
  3. Assign the number of years, 4, to the variable named n_years.
  4. Use the cat() function to display the values of initial_money, interest_rate, and n_years in the order they were created.

Task

Regarding the deposit task, let's assign the relevant data to variables using the assignment operator:

  1. Assign the initial amount of money, 2000, to the variable named initial_money.
  2. Assign the interest rate, 13, to the variable named interest_rate.
  3. Assign the number of years, 4, to the variable named n_years.
  4. Use the cat() function to display the values of initial_money, interest_rate, and n_years in the order they were created.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Section 1. Chapter 8
toggle bottom row

Variables

Saving and reusing data effectively in programming often requires the use of variables.

To ensure clear and error-free programming, certain rules must be followed when naming variables. Here are some guidelines:

  • Variable names must not start with a number or with a period followed by a number;
  • They should not include the % symbol;
  • They must not begin with an underscore _;
  • They can start with a period if it is not followed by a number.

Choosing meaningful variable names is considered best practice. For instance, naming a variable year to store the value 2020 is more intuitive than using nondescript names like a or b. While this isn't mandatory, it significantly enhances code readability for both the author and others.

To assign a value to a variable, the assignment operator = is used. For example, year = 2020 assigns the value 2020 to the variable named year:


              
12

            
year = 2020
cat(year)
copy

Task

Regarding the deposit task, let's assign the relevant data to variables using the assignment operator:

  1. Assign the initial amount of money, 2000, to the variable named initial_money.
  2. Assign the interest rate, 13, to the variable named interest_rate.
  3. Assign the number of years, 4, to the variable named n_years.
  4. Use the cat() function to display the values of initial_money, interest_rate, and n_years in the order they were created.

Task

Regarding the deposit task, let's assign the relevant data to variables using the assignment operator:

  1. Assign the initial amount of money, 2000, to the variable named initial_money.
  2. Assign the interest rate, 13, to the variable named interest_rate.
  3. Assign the number of years, 4, to the variable named n_years.
  4. Use the cat() function to display the values of initial_money, interest_rate, and n_years in the order they were created.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Saving and reusing data effectively in programming often requires the use of variables.

To ensure clear and error-free programming, certain rules must be followed when naming variables. Here are some guidelines:

  • Variable names must not start with a number or with a period followed by a number;
  • They should not include the % symbol;
  • They must not begin with an underscore _;
  • They can start with a period if it is not followed by a number.

Choosing meaningful variable names is considered best practice. For instance, naming a variable year to store the value 2020 is more intuitive than using nondescript names like a or b. While this isn't mandatory, it significantly enhances code readability for both the author and others.

To assign a value to a variable, the assignment operator = is used. For example, year = 2020 assigns the value 2020 to the variable named year:


              
12

            
year = 2020
cat(year)
copy

Task

Regarding the deposit task, let's assign the relevant data to variables using the assignment operator:

  1. Assign the initial amount of money, 2000, to the variable named initial_money.
  2. Assign the interest rate, 13, to the variable named interest_rate.
  3. Assign the number of years, 4, to the variable named n_years.
  4. Use the cat() function to display the values of initial_money, interest_rate, and n_years in the order they were created.

Switch to desktop for real-world practiceContinue from where you are using one of the options below
Section 1. Chapter 8
Switch to desktop for real-world practiceContinue from where you are using one of the options below
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