[R] Printing a single "\" character

[Thomas Lumley]

On Tue, 19 Apr 2005, Firas Swidan wrote:

> Hi,
> I have a small R question: how to print a single "\" character? I have the
> following results:
>> print("\") does not work
>
>> print("\\")
> [1] "\\"

Use cat("\\").

> I need to make the following substitution as well, but it does not work
> either:
>> sub("_","\_","g_g")
> [1] "g_g"

Use
   sub("_","\\\\_","g_g")

If you print() the result it will look as though it has a double \, but 
that's an optical illusion. cat() will show it correctly with a single \ 
(and nchar() will confirm that it has 4 characters).

 	-thomas