Re: [R] Printing a single "\" character

From: Thomas Lumley <tlumley_at_u.washington.edu>
Date: Wed 20 Apr 2005 - 02:06:53 EST

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



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