Loop over List R

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I am using a function I found on a Duke Sports Analytics site to scrape college basketball games from sportsreference.com. It takes a url as an argument. The code below scrapes all games for Duke from 2011-2022. I have a list of multiple teams (Duke, Baylor, Kansas, Gonzaga). I need to substitute "duke" within the url being concatenated with the 4 team names I listed. How could I alter this code to loop through all those teams, and not just Duke which is hardcoded into the code?

teams <- as.list(c("Gonzaga", "Baylor", "Kansas", "Duke"))

game_logs <- tibble(
   season_url = 2011:2022,
  season = paste0(season_url - 1, "-", str_sub(season_url, start = 3)),
  url = paste0("https://www.sports-reference.com/cbb/schools/duke/", season_url, "- 
schedule.html")
) %>%
  mutate(data = map(url, possibly(scrape_game_logs, otherwise = NA)))
dplyr r loops
1 Answers

We may need to create combinations with crossing

library(dplyr)
library(tidyr)
library(stringr)
teams <- c("Gonzaga", "Baylor", "Kansas", "Duke")
df1 <- crossing(season_url = 2011:2022, teams) %>%
     mutate(season = str_c(season_url - 1, "-", str_sub(season_url, start = 3)),
   url = glue::glue("https://www.sports-reference.com/cbb/schools/",
            "{teams}/{season_url}-schedule.html"))

-output

> df1
# A tibble: 48 × 4
   season_url teams   season  url                                                                    
        <int> <chr>   <chr>   <glue>                                                                 
 1       2011 Baylor  2010-11 https://www.sports-reference.com/cbb/schools/Baylor/2011-schedule.html 
 2       2011 Duke    2010-11 https://www.sports-reference.com/cbb/schools/Duke/2011-schedule.html   
 3       2011 Gonzaga 2010-11 https://www.sports-reference.com/cbb/schools/Gonzaga/2011-schedule.html
 4       2011 Kansas  2010-11 https://www.sports-reference.com/cbb/schools/Kansas/2011-schedule.html 
 5       2012 Baylor  2011-12 https://www.sports-reference.com/cbb/schools/Baylor/2012-schedule.html 
 6       2012 Duke    2011-12 https://www.sports-reference.com/cbb/schools/Duke/2012-schedule.html   
 7       2012 Gonzaga 2011-12 https://www.sports-reference.com/cbb/schools/Gonzaga/2012-schedule.html
 8       2012 Kansas  2011-12 https://www.sports-reference.com/cbb/schools/Kansas/2012-schedule.html 
 9       2013 Baylor  2012-13 https://www.sports-reference.com/cbb/schools/Baylor/2013-schedule.html 
10       2013 Duke    2012-13 https://www.sports-reference.com/cbb/schools/Duke/2013-schedule.html   
# … with 38 more rows
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