Suppose a researcher wants to put together a final dataset using two dataframes, left frame and right_frame. In the left_frame, an observation is identified by a given state, year and age group. However, in the right_frame, an observation is identified by a given state and year. Which of the following is the correct R script to merge these frames? O A. merge(left_frame, right_frame, by = "state") O B. dplyr: left_frame %>% left_join(right_frame, by = c("state", "year","age_group")) O C. merge(left_frame, right_frame, by = c("state", "year")) O D. merge(left_frame, right_frame, by = c("state", "year", "age_group")) O E. dplyr: right_frame %>% left_join(left_frame, by = "state")

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Suppose a researcher wants to put together a final dataset using two dataframes, left_frame and right_frame. In the left_frame, an
observation is identified by a given state, year and age group. However, in the right_frame, an observation is identified by a given state and
year. Which of the following is the correct R script to merge these frames?
O A. merge(left_frame, right_frame, by = "state")
O B. dplyr: left_frame %>% left_join(right_frame, by = c("state", "year","age_group"))
O C. merge(left_frame, right_frame, by = c("state", "year"))
O D. merge(left_frame, right_frame, by = c("state", "year", "age_group"))
O E. dplyr: right_frame %>% left_join(left_frame, by = "state")
Transcribed Image Text:Suppose a researcher wants to put together a final dataset using two dataframes, left_frame and right_frame. In the left_frame, an observation is identified by a given state, year and age group. However, in the right_frame, an observation is identified by a given state and year. Which of the following is the correct R script to merge these frames? O A. merge(left_frame, right_frame, by = "state") O B. dplyr: left_frame %>% left_join(right_frame, by = c("state", "year","age_group")) O C. merge(left_frame, right_frame, by = c("state", "year")) O D. merge(left_frame, right_frame, by = c("state", "year", "age_group")) O E. dplyr: right_frame %>% left_join(left_frame, by = "state")
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