Code results can be inserted directly into the text of a .Rmd file by enclosing the code with
`r `. The file below uses
`r ` twice to call
colorFunc, which returns “heat.colors.”
This makes it easy to update the report to refer to another function.
R Markdown will always
As a result, inline output is indistinguishable from the surrounding text. Inline expressions do not take knitr options.