शुरू करेंमुफ़्त में शुरू करें

Mutating and counting

You can combine multiple verbs together to answer increasingly complicated questions of your data. For example: "What are the US states where the most people walk to work?"

You'll use the walk column, which offers a percentage of people in each county that walk to work, to add a new column and count based on it.

counties_selected <- counties %>%
  select(county, region, state, population, walk)

यह अभ्यास पाठ्यक्रम का हिस्सा है

Data Manipulation with dplyr

पाठ्यक्रम देखें

अभ्यास निर्देश

  • Use mutate() to calculate and add a column called population_walk, containing the total number of people who walk to work in a county.
  • Use a (weighted and sorted) count() to find the total number of people who walk to work in each state.

इंटरैक्टिव व्यावहारिक अभ्यास

इस अभ्यास को इस नमूना कोड को पूरा करके आज़माएँ।

counties_selected %>%
  # Add population_walk containing the total number of people who walk to work 
  ___
  # Count weighted by the new column, sort in descending order
  ___
कोड संपादित करें और चलाएँ