text: Data Extraction | Data Frames
  R Introduction: Part II
  
  Conteúdo do Curso
  
  R Introduction: Part II
  
  1. Matrices
  2. Data Frames
  3. Lists
  
  Data Extraction
  
  Finish the section with practice on abstract local furniture store selling data!
  
  Tarefa
  
  You will work with the data below. This data is stored in the `store` variable.
  
   Item Price Sold Sofa 340 67 Armchair 150 81 Dining table 115 79 Bookshelf 160 42 Kitchen Cabinet 70 67
  
  1. Add a new column named `'Revenue'` with the revenue of each item (multiply `'Price'` and `'Sold'`). To access columns, use the `\$` sign.
  2. Using the `sum()` function, calculate the total number of items sold. Save in `items_sold` variable and output its value.
  3. Calculate total revenue using `sum()` function. Save in the `total_revenue` variable and output its value.
  4. Find out the average price of the sold item - divide `total_revenue` by `items_sold`.
  
  Tarefa
  
  You will work with the data below. This data is stored in the `store` variable.
  
   Item Price Sold Sofa 340 67 Armchair 150 81 Dining table 115 79 Bookshelf 160 42 Kitchen Cabinet 70 67
  
  1. Add a new column named `'Revenue'` with the revenue of each item (multiply `'Price'` and `'Sold'`). To access columns, use the `\$` sign.
  2. Using the `sum()` function, calculate the total number of items sold. Save in `items_sold` variable and output its value.
  3. Calculate total revenue using `sum()` function. Save in the `total_revenue` variable and output its value.
  4. Find out the average price of the sold item - divide `total_revenue` by `items_sold`.
  
  Tudo estava claro?
  
  Seção 2. Capítulo 7
  
  Data Extraction
  
  Finish the section with practice on abstract local furniture store selling data!
  
  Tarefa
  
  You will work with the data below. This data is stored in the `store` variable.
  
   Item Price Sold Sofa 340 67 Armchair 150 81 Dining table 115 79 Bookshelf 160 42 Kitchen Cabinet 70 67
  
  1. Add a new column named `'Revenue'` with the revenue of each item (multiply `'Price'` and `'Sold'`). To access columns, use the `\$` sign.
  2. Using the `sum()` function, calculate the total number of items sold. Save in `items_sold` variable and output its value.
  3. Calculate total revenue using `sum()` function. Save in the `total_revenue` variable and output its value.
  4. Find out the average price of the sold item - divide `total_revenue` by `items_sold`.
  
  Tarefa
  
  You will work with the data below. This data is stored in the `store` variable.
  
   Item Price Sold Sofa 340 67 Armchair 150 81 Dining table 115 79 Bookshelf 160 42 Kitchen Cabinet 70 67
  
  1. Add a new column named `'Revenue'` with the revenue of each item (multiply `'Price'` and `'Sold'`). To access columns, use the `\$` sign.
  2. Using the `sum()` function, calculate the total number of items sold. Save in `items_sold` variable and output its value.
  3. Calculate total revenue using `sum()` function. Save in the `total_revenue` variable and output its value.
  4. Find out the average price of the sold item - divide `total_revenue` by `items_sold`.
  
  Tudo estava claro?
  
  Seção 2. Capítulo 7
  
  Data Extraction
  
  Finish the section with practice on abstract local furniture store selling data!
  
  Tarefa
  
  You will work with the data below. This data is stored in the `store` variable.
  
   Item Price Sold Sofa 340 67 Armchair 150 81 Dining table 115 79 Bookshelf 160 42 Kitchen Cabinet 70 67
  
  1. Add a new column named `'Revenue'` with the revenue of each item (multiply `'Price'` and `'Sold'`). To access columns, use the `\$` sign.
  2. Using the `sum()` function, calculate the total number of items sold. Save in `items_sold` variable and output its value.
  3. Calculate total revenue using `sum()` function. Save in the `total_revenue` variable and output its value.
  4. Find out the average price of the sold item - divide `total_revenue` by `items_sold`.
  
  Tarefa
  
  You will work with the data below. This data is stored in the `store` variable.
  
   Item Price Sold Sofa 340 67 Armchair 150 81 Dining table 115 79 Bookshelf 160 42 Kitchen Cabinet 70 67
  
  1. Add a new column named `'Revenue'` with the revenue of each item (multiply `'Price'` and `'Sold'`). To access columns, use the `\$` sign.
  2. Using the `sum()` function, calculate the total number of items sold. Save in `items_sold` variable and output its value.
  3. Calculate total revenue using `sum()` function. Save in the `total_revenue` variable and output its value.
  4. Find out the average price of the sold item - divide `total_revenue` by `items_sold`.
  
  Tudo estava claro?
  
  Finish the section with practice on abstract local furniture store selling data!
  
  Tarefa
  
  You will work with the data below. This data is stored in the `store` variable.
  
   Item Price Sold Sofa 340 67 Armchair 150 81 Dining table 115 79 Bookshelf 160 42 Kitchen Cabinet 70 67
  
  1. Add a new column named `'Revenue'` with the revenue of each item (multiply `'Price'` and `'Sold'`). To access columns, use the `\$` sign.
  2. Using the `sum()` function, calculate the total number of items sold. Save in `items_sold` variable and output its value.
  3. Calculate total revenue using `sum()` function. Save in the `total_revenue` variable and output its value.
  4. Find out the average price of the sold item - divide `total_revenue` by `items_sold`.