How do I reference an object inline in LyX that is in a knitr chunk?

Question

Suppose I have an object that was processed in an earlier knitr chunk, say

my_df <- read.dta('somefile.dta')
x <- mean(my_df$age)

Putting an inline knitr chunk does not work -- the knitr chunk is written out as text; it is not processed. And I don't think I can use \Sexpr{x} because I don't seem to be able to refer to x in \Sexpr{}.

I'm using LyX 2.0.3 and svn, and knitr version .3

Answer 1

Surely you can use x in \Sexpr{} after the chunk in which x was created. Did you really try it at all? One reminder, though, is that you have to use TeX code in LyX to input \Sexpr{x} (press Ctrl+L) to make sure \ is not translated to \backslash.