文件中的错误（文件，“rt”）：无法打开连接另外：警告消息：在文件（文件，“rt”）中：无法打开文件

Question

I am very new to R and hoping that someone can help me out. I run this code and I keep getting the cannot open the connection error. I set the directory to the folder I saved the data in and even checked with file.existis("file_Path/filename") and I got True . Yet, I still get this error. Please help me: Here is the first part of the Code:

    daphnia=function(dr="c")
    {
    da=read.csv(paste(dr,":Data_Path/filename",sep=""))
}

Answer 1

Usually, this error means that the filepath is incorrect. Can you print out the entire path, ie print(paste(dr,":Data_Path/filename",sep="") ? Sometimes there is an issue of using \ instead of / as well. Is it possible you need C:/Data_Path/filename ?