# [R] Why is format(10000, big.mark = "\\,") not 10\,000?

Marius Hofert m_hofert at web.de
Thu Dec 30 19:53:28 CET 2010

```Dear Uwe,

> Actually I expected
>
> format(10000, big.mark = "\\\\,")
>
> to work (you need to double excape the backslashes here).

this I also tried :-)

>
> But the two characters are reversed due to the code in prettyNum(). Not sure if it is expected, but the user was probably not expected to use more than a single character as the big.mark.
>
> You can get it right by reversing as in:
>
> format(10000, big.mark = ",\\\\")

but then I get "10\\,000" instead of "10\,000". The reason why I want to have "10\,000" is for use in LaTeX. If I produce the format "10\\,000" in a table, then xtable gives me 10\$\backslash\$,000 for the corresponding cell entry, which is wrong :-(. Do you know a trick for that?

Cheers,

Marius

>
>
> Uwe Ligges
>
>
>
>
> On 30.12.2010 19:32, Marius Hofert wrote:
>> Hi,
>>
>> why does format(10000, big.mark = "\\,") not give me "10\,000"? How can I get this kind of "big.mark"?
>>
>> Cheers,
>>
>> Marius
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