我有一个用户在这个线程中好心帮助我的代码。除了结果没有存储在数据帧中之外,它完全按照我的意愿执行。
## Setting up API Call
base_string1 <- "https.api.companyname/jurisdiction="
base_string2 <- "&date="
end_string <- "api_token=XYZ"
## Specifying objects to loop over
dates <- seq(as.Date("1990-01-01"), as.Date("2022-01-01"), by = "year")
dates <- paste(head(dates, -1), tail(dates-1, - 1), sep = ":")
countries<- paste0("eu_", c("fra", "ger"))
## Looping over
map_dfr(dates, function(dates){
map_dfr(states, function(countries){
api_string <- paste0(base_string1, countries, base_string2, dates, end_string)
print(api_string)
json <- jsonlite::fromJSON(api_string)
data.frame("countries" = countries,
"dates" = dates,
"total_number" = json[["results"]]$total_number)
})
})
这给了我
countries dates total_number
1 eu_ger 1990-01-01:1990-12-31 2404
2 eu_fra 1990-01-01:1990-12-31 2056
3 eu_ger 1991-01-01:1991-12-31 3490
4 eu_fra 1991-01-01:1991-12-31 6070
5 eu_ger 1992-01-01:1992-12-31 7808
6 eu_fra 1992-01-01:1992-12-31 1904
这是我想要的信息,但我想将其存储在我可以访问的数据帧中。我还想把这些国家称为";德国";以及法国;而不是日期范围,我想称之为1992年(还有一个版本,我按月计算,在这种情况下,我希望值是年-月(。
我尝试在API调用之后添加以下内容,但没有成功。
json_df<- as_tibble(json)
json_df <- data.frame("countries" = countries,
"dates" = dates,
"total_number" = json[["results"]]$total_number)
我如何将结果存储在数据帧中,并在理想情况下更改国家名称/日期?
如以上评论中所建议的,尝试:
my_results <- map_dfr(dates, function(dates){
map_dfr(states, function(countries){
api_string <- paste0(base_string1, countries, base_string2, dates, end_string)
print(api_string)
json <- jsonlite::fromJSON(api_string)
data.frame("countries" = countries,
"dates" = dates,
"total_number" = json[["results"]]$total_number)
})
})