如何根据R中的当前日期更改目录？

Question

I need to run a report each day. I want to save the raw data and output in a particular folder followed by a sub folder for year, month, date. Eg today's would be

C:\\My Documents\\My Project\\2016\\February\\27.

How would I set this up as my working directory?

Answer 1

Since your goal is to have included backslashes in the string, which are the escape character for R, you will need to double them in the format argument and in the arguments to paste .

 format( Sys.Date(), "%Y\\%B\\%d")
#[1] "2016\\February\\27"

paste0("C:\\My Documents\\My Project\\", format( Sys.Date(), "%Y\\%B\\%d") )
[1] "C:\\My Documents\\My Project\\2016\\February\\27"

You can also switch to (single) forward-slashes which may be less confusing.