alter default display behavior for inline expressions

[Carl Boettiger]

Hi list,

Is there a way to set some option such that in-line expressions are always wrapped with I() and prettyNum?

For instance, it is nice to include results in the final text that involve the numerical output of some R call
without making it obvious that they come from code (i.e. numbers that have commas in the correct places,
a sensible number of digits, and no syntax highlighting).  It's a bit cumbersome to use

    `ri I(prettyNum(round(x,2),big.mark=",")) ir`

each time, instead of just

    `ri x ir`

(using Yuhui's shortened github patterns in for inline code in these examples). 
Just wondering.

Thanks!

- Carl
--
Carl Boettiger
UC Davis
http://www.carlboettiger.info/

[Yihui Xie]

As usual, you can reset the default hooks; in this case, it is the inline hook:

knit_hooks$set(inline = function(x) {
prettyNum(round(x,2), big.mark=",")
})

Actually rounding comes by default according to getOption('digits'),
but prettyNum() is not supported in the default hook. Almost
everything about output in knitr is a matter of default vs
customization. I have to make the default more general, so I cannot
make the comma format into the default hook. Of course I can make the
default hook accept outside options, as long as they are convincing.

Regards,
Yihui
--
Yihui Xie <xiey...@gmail.com>
Phone: 515-294-2465 Web: http://yihui.name
Department of Statistics, Iowa State University
2215 Snedecor Hall, Ames, IA

[Jeff van Geete]

Is there a way to have the plot axis markings follow the same format as what the hook has set? These options settings are working for my text-based output, but the (margin) figures still have '8000000' (eg)

[Rlastra]

This work for me Jeff....i hope it helps!!

hint: use ggplot and is thinking when your values are on "y" axis

  geom_label(aes(label=(paste0(Nameofvariable,"%"," Sin"))),size=3,hjust=0, vjust=0)+

  stat_summary(fun.y = sum,

               aes(label = format(..y.., big.mark = ",")),

               geom = "label",

               vjust = 0,

               hjust = -1,

               size =3)