Set global thousand separator on knitr

Question

I want all the numbers on my knitr report to be formatted as such by default:

format(num, digits = 2, big.mark = \" \", decimal.mark = \",\")

Answer 1

As Frank noted, setting a knitr hook such as the following solves the problem:

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

It turns out knitr hooks are a great way to tweak the output of R chunks on knitr. It's really worth it to take a look at http://yihui.name/knitr/hooks.

Source: https://groups.google.com/forum/#!msg/knitr/CnFwvk1Qn1E/WY-Xhf7Ph3AJ