首页用R语言 rio是一个csv文件 Use rio to answer the following questions. How many athletes competed in the 2016 Summer Olympics? How many countries were represented? What were these countries, and how many athletes competed for each one? Which country brought the most athletes, and how many was this?

用R语言 rio是一个csv文件 Use rio to answer the following questions. How many athletes competed in the 2016 Summer Olympics? How many countries were represented? What were these countries, and how many athletes competed for each one? Which country brought the most athletes, and how many was this?

时间: 2024-03-29 12:40:16 浏览: 53

Sure, I can help you with that! To answer your questions using R and rio, you can follow these steps: 1. Load the rio library and read the CSV file: ```{r} library(rio) olympics <- import("path/to/olympics.csv") ``` Make sure to replace "path/to/olympics.csv" with the actual path to your CSV file. 2. Find the number of athletes who competed in the 2016 Summer Olympics: ```{r} nrow(olympics) ``` This will return the number of rows in the dataset, which corresponds to the number of athletes. 3. Find the number of countries represented: ```{r} length(unique(olympics$NOC)) ``` This will return the number of unique values in the "NOC" column, which represents the countries. 4. Find the number of athletes who competed for each country: ```{r} library(dplyr) athletes_by_country <- olympics %>% group_by(NOC) %>% summarise(athletes = n()) athletes_by_country ``` This will group the dataset by country and count the number of athletes for each one. 5. Find the country with the most athletes: ```{r} athletes_by_country %>% arrange(desc(athletes)) %>% head(1) ``` This will sort the countries by number of athletes in descending order, and return the first one (i.e., the one with the most athletes). Hope this helps! Let me know if you have any other questions.

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