how to remove the file when “permisson denied” in R?

My system is "win7", and I want to delete the file "workspace".

# [1] FALSE
# Warning message:
# In file.remove("c:\\workspace") :
# cannot remove file 'c:\workspace', reason 'Permission denied'

How can I give the R the power to delete it?"c:\\workspace")
#               size isdir mode               mtime               ctime
# c:\\workspace    0  TRUE  777 2014-01-01 14:42:51 2014-01-01 14:33:27
#                             atime exe
# c:\\workspace 2014-02-25 09:39:08  no


@TypeIA answered it in a comment, but I'll formalize it here: help(unlink).

# [1] TRUE
# [1] TRUE

# [1] FALSE
# Warning message:
# In file.remove("somedir") :
#   cannot remove file 'somedir', reason 'Permission denied'
unlink('somedir', recursive=TRUE)

(The directory is gone.)

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