Підсумок
Якщо ви хочете підрахувати кількість входжень кожного значення у векторі, функція summary() є саме тим, що вам потрібно.
# Factor variable
curr_f <- factor(c('USD', 'EUR', 'AUD', 'NOK',
'CHF', 'EUR', 'AUD', 'EUR'))
# Show summary
summary(curr_f)
# Factor variable curr_f <- factor(c('USD', 'EUR', 'AUD', 'NOK', 'CHF', 'EUR', 'AUD', 'EUR')) # Show summary summary(curr_f)
Remember, the sequence of the levels reported by summary() corresponds to the order defined when you used the factor() function. If no order is defined, it defaults to numerical or alphabetical order.
Завдання
Swipe to start coding
For the grades data mentioned earlier, compute the frequency of each grade within the grades_f factor.
Рішення
# Vector of grades and converting into factor
grades <- c("A","F","C","C","F","A","F","F","B",
"C","D","D","B","A","B","D","F","A",
"B","A","A","C","F","A","D","C")
grades_f <- factor(grades, labels = c('F', 'D', 'C', 'B', 'A'), ordered = T)
# Output the quantity of each possible value in grades_f
summary(grades_f)
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Секція 3. Розділ 4
# Vector of grades and converting into factor
grades <- c("A","F","C","C","F","A","F","F","B",
"C","D","D","B","A","B","D","F","A",
"B","A","A","C","F","A","D","C")
grades_f <- factor(grades, labels = c('F', 'D', 'C', 'B', 'A'), ordered = T)
# Output the quantity of each possible value in grades_f
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