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I wish to use in line R code as part of a header in a r markdown file. However when i knit the file the fonts used on the header are different. How can I ensure the fonts are the same. A simple example is below. 

`r 1+1`  Header 
-------------------------
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3
  • If it does not work, the only reason that I can think of is that your knitr version is too old. You may need to update.packages(). See FAQ 1. Commented Feb 23, 2013 at 5:48
  • Strange, it works just fine for me. Perhaps I'm also using an old version of knitr. checks Commented Feb 23, 2013 at 8:29
  • Apparently I was using 0.8. Most recent version on CRAN is 1.1. Commented Feb 23, 2013 at 8:30

2 Answers 2

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9

You can wrap content in backticks to denote r code inline, as follows: 

## Title `r 1+1` Header
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I needed to put a $ before the first backtick and after the last backtick.
2

Without a reproducible example it is hard to be precise, but one thing you might want to consider is to use the results="asis" chunk option in your R code so that the results are not wrapped in a code markup block. I am not sure how this works with inline commands, but you could use a regular R block and have it create the entire header from the R code, something like:

```r results="asis"
cat('# ', 1+1, " Header")
```
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