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Data Frames, Ranks and Orders

This exercise is somewhat more challenging. We are going to repeat the previous exercise but this time order my_df so that the states are ordered from least populous to most.

This exercise is part of the course

Data Science R Basics

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Exercise instructions

  • Create variables states and ranks to store the state names and ranks by population size respectively.
  • Create an object ind that stores the indexes needed to order the population values, using the order command. For example we could define o <- order(murders$population)
  • Create a data frame with both variables following the correct order. Use the bracket operator [ to re-order each column in the data frame. For example, states[o] orders the abbreviations based by population size.
  • The columns of the data frame must be in the specific order and have the specific names: states, ranks.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Define a variable states to be the state names from the murders data frame


# Define a variable ranks to determine the population size ranks 


# Define a variable ind to store the indexes needed to order the population values


# Create a data frame my_df with the state name and its rank and ordered from least populous to most 
Edit and Run Code