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Using ratios to describe the frequency of a name

In the video, you learned how to find the difference in the frequency of a baby name between consecutive years. What if instead of finding the difference, you wanted to find the ratio?

You'll start with the babynames_fraction data already, so that you can consider the popularity of each name within each year.

Это упражнение является частью курса

Data Manipulation with dplyr

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Инструкции к упражнению

  • Arrange the data in ascending order of name and then year.
  • Group by name so that your mutate works within each name.
  • Add a column ratio containing the ratio (not difference) of fraction between each year.

Интерактивное практическое упражнение

Попробуйте выполнить это упражнение, дополнив этот пример кода.

babynames_fraction %>%
  # Arrange the data in order of name, then year 
  ___
  # Group the data by name
  ___
  # Add a ratio column that contains the ratio of fraction between each year 
  ___
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