
You have to escape every backslash by a second backslash - try this:

f <- "C:\\files\\data\\" # create character string
write(f, "AAAA") # write to file
system("open -t AAAA") # see what happen to the character string

> file_dir <- c("C:\files\data\")


________________________________________________________

Christoph Heibl

Systematic Botany
Ludwig-Maximilians-Universität München
Menzinger Str. 67
D-80638 München
GERMANY

phone:     +49-(0)89-17861-251
e-mail:    heibl@lmu.de

http://www.christophheibl.de/ch-home.html

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