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R Introduction: Part I
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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

bookVariables

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

Tarefa

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.

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Seção 1. Capítulo 8
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bookVariables

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

Tarefa

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 desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
Tudo estava claro?

Como podemos melhorá-lo?

Obrigado pelo seu feedback!

Seção 1. Capítulo 8
toggle bottom row

bookVariables

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

Tarefa

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 desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
Tudo estava claro?

Como podemos melhorá-lo?

Obrigado pelo seu feedback!

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

Tarefa

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 desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
Seção 1. Capítulo 8
Switch to desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
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