[R] Sweave and backslashes

Dieter Menne dieter.menne at menne-biomed.de
Fri Feb 6 08:24:52 CET 2009

cls59 <sharpsteen <at> mac.com> writes:

> I am an avid Sweave user and I am trying to pretty print floating point
> numbers for latex output. For example in my document, I would like:
> 4.2\cdot 10^-{8}
> Instead of:
> 4.2e-08
> The Hmisc package has a nice function for doing this- but Hmisc has a ton of
> dependencies and has proved very unportable to the various machines I work
> on. So, I set out to write my own function that just uses basic R commands,
> it looks like this:

I have my special version of it in the library :

"latexSNdouble" <-
function (val)
  # special copy of Hmisc latexSN with \\\\
  x <- format(val)
  x <- sedit(val, c("e+00", "e-0*", "e-*", "e+0*", "e+*"), c("",

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