R-Studio无法读取.txt文件

Question

I have a problem that I cannot solve, and it is the following: I am writing a document with R-Studio, but every time I try to run it, the program says to me that there is an error. The error apparently looks like to be linked to the fact that R studio is not able to load a table from a .txt file.

This is what I have done:

1. I opened R-Studio and I set the working directory (with the setwd() command) in the folder where the .txt file from which I want to source the table is located;
2. I opened the R-Markdown script file (with .Rmd extension) and I run it ('knit HTML' button);

3. R-Studio gave me the following error:

   Errore in eval(expr, envir, enclos) : oggetto "mydata" non trovato; Calls: ... handle -> withCallingHandlers -> withVisible -> eval -> eval

How can I solve this? I cannot figure out why R-Studio is not able to read the table and load the data.frame , while the Console inside R-Studio is.

Thank you for any help you can provide.

Answer 1

When you knit a document in R-Studio, this happens in a separate environment. This means that variables that are available while you type in the console are not available when you knit a document. Similarly, when you set the working directory in the console, this has no effect on knitting a document.

So the solution to your problem could be to simply add the setwd() command to your .Rmd file.

Answer 2

在您的R Markdown文件中，您必须指定相对于Rmd文件位置的txt文件的路径。