Hello Everyone, 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: latexNum <- function (x,dig=4,sci=T) { x <- format(x,digits=dig,scientific=sci) x <- gsub("e\\+00","",x) x <- gsub("e\\-0([0-9]*)","\\\\cdot 10^{-\\1}",x) x <- gsub("e\\-([0-9]*)","\\\\cdot 10^{-\\1}",x) x <- gsub("e\\+0([0-9]*)","\\\\cdot 10^{\\1}",x) x <- gsub("e\\+([0-9]*)","\\\\cdot 10^{\\1}",x) return(x) } Everything works nicely, if I type > latexNum(4*10^-3) I get [1] "4\\cdot10^{-3}" And the following: > cat(latexNum(4*10^-3)) Produces: 4\cdot10^{-3} However the following in a .Rnw file: $\Sexpr{latexNum(4*10^-3)}$\\ Only produces this in the .tex output file: $4cdot 10^{-3}$\\ No amount of extra backslashing seems to help. Any idea why my escapes are not being respected? ----- Charlie Sharpsteen Undergraduate Environmental Resources Engineering Humboldt State University -- View this message in context: http://www.nabble.com/Sweave-and-backslashes-tp21864385p21864385.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.