R：從 2 個 zip 文件夾中讀取 csv

Question

我在一些不幸的情況下工作，需要從 2 個 zip 文件夾中讀取 csv 文件。 我的意思是文件路徑看起來像這樣：

//path/folder1.zip/folder2.zip/wanttoread.csv

我試着模仿這里發現的這個問題的巧妙工作： 從.zip 中提取某些文件，但到目前為止還沒有運氣。 具體來說，當我最后運行類似的東西時，我收到一條錯誤消息

Error in fread(x, sep = ",", header = TRUE, stringsAsFactors = FALSE) : 
embedded nul in string:

接下來是一堆編碼的廢話。

關於如何處理這個問題的任何想法？ 提前致謝！

Answer 1

這是一種使用tempdir()的方法：

temp<-tempdir(check = TRUE) #Create temporary directory to extract into

unzip("folder1.zip",exdir = temp) #Unzip outer archive to temp directory

unzip(file.path(temp,"folder2.zip"), #Use file.path to generate the path to the inner archive
      exdir = file.path(temp,"temp2")) #Extract to a subfolder inside temp
                                       #This covers the case when the outer archive might also have a file named wanttoread.csv

list.files(file.path(temp,"temp2")) #We can see the .csv file is now there
#[1] "wanttoread.csv"

read.csv(file.path(temp,"temp2","wanttoread.csv")) #Read it in
#   Var1         Var2
#1 Hello obewanjacobi