[R] file path

[Wincent]

Dear all, is there any function to assert whether a file path is
legitimate, and to convert any potential file path to a legitimate
file path?

I automate a batch of files and write them to plain text files with
cat(). The file argument of cat() is generated automatically which may
contain characters such as ? < >, unacceptable in Windows OS. What I
do at this moment is to strip such characters off with gsub(). Is
there any direct way to make legitimate file path without detailed
knowledge about the naming rule specific to a OS?

Best

-- 
Wincent Ronggui HUANG
Sociology Department of Fudan University
PhD of City University of Hong Kong
http://homepage.fudan.edu.cn/rghuang/cv/