您正在使用錯誤的鏈接來獲取數據。您可以通過訪問「導出」
library(jsonlite)
address <- "https://data.cityofchicago.org/api/views/qnmj-8ku6/rows.json?accessType=DOWNLOAD"
sample <- fromJSON(address)
length(sample)
# [1]
length(sample[[2]])
# [1] 274228
雖然看到了正確的鏈接,你可能想要得到它爲.csv,使其更易於使用直線距離?
address <- "https://data.cityofchicago.org/api/views/qnmj-8ku6/rows.csv?accessType=DOWNLOAD"
sample_csv <- read.csv(address)
nrow(sample_csv)
# [1] 274228
str(sample_csv)
# 'data.frame': 274228 obs. of 22 variables:
# $ ID : int 10512552 10517063 10517120 10518590 10518648
# $ Case.Number : Factor w/ 274219 levels "HA107183","HA156050",..
# $ Date : Factor w/ 112977 levels "01/01/2014 01:00:00 AM",..
# $ Block : Factor w/ 27499 levels "0000X E 100TH PL",..
# $ IUCR : Factor w/ 331 levels "0110","0141",..
# $ Primary.Type : Factor w/ 33 levels "ARSON","ASSAULT",..
# $ Description : Factor w/ 310 levels "$500 AND UNDER",..
# ... etc
確定嗎?轉到「https:// data.cityofchicago.org/resource/qnmj-8ku6.json」頁面,滾動到末尾並查看「id」字段(9909096)。然後看看'tail(sample)'''id'字段(9909096) – SymbolixAU
「原始城市門戶網站數據庫」的鏈接是什麼?原始網站: – SymbolixAU
:https://data.cityofchicago.org/Public-Safety/Crimes-2014/qnmj-8ku6 – lnx