What folder does R look at when trying to import a file?  I'm using the read.csv command.

You can use getwd() to see where R is looking, and setwd() to change it. Or you can use the full path of the filename.

You can use full address. (e.g., "C:/. . .")

If you are on Windows, you can also use: file.choose() where the filename goes and a window pops up in which you can make a choice.

To add it further you can use this to write and read files, much elegant way of handling files http://stackoverflow.com/questions/4216753/check-existence-of-directory-and-create-if-doesnt-exist

I have very interesting question about file import into R.  I have a file mydata.cvs   This file is updating by the software every 2 seconds and data is added. How do you work out this problem ? I mean how to refresh data in R ?  Do you use some file read/write ? I just wondering why doesn't exist stream data package in such useful language ? I know that R doesnt support streams by itself, but would be nice to have one. Nowadays the data changes  very quickly and it will be very usefull