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Data Manipulation with dplyr

Run the hidden code cell below to import the data used in this course.

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# Add your code snippets here
#just trying out the datacamp workspace to memorize the "%in%"-function and the badly explained fraction example, which is also part of my GD cheat sheet
#dplyr course, chapter 4, around 2/3 in. Wish the exercises were numbered

names_normalized <- babynames %>%
                     group_by(name) %>%
                     mutate(name_total = sum(number),
                            name_max = max(number)) %>%
                     ungroup() %>%
                     mutate(fraction_max = number / name_max)
names_filtered <- names_normalized %>%
  # Filter for the names Steven, Thomas, and Matthew
  filter(name %in% c("Steven", "Thomas", "Matthew"))

# Visualize these names over time
ggplot(names_filtered, aes(x = year, y = fraction_max, color = name)) + geom_line()