To use JuliaCall
package for julia engine in R Markdown document. Just set the engine for julia to JuliaCall::eng_juliacall
like this:
knitr::knit_engines$set(julia = JuliaCall::eng_juliacall)
## This is a julia language chunk.
## In julia, the command without ending semicolon will trigger the display
## so is JuliaCall package.
## The julia display will follow immediately after the corresponding command
## just as the R code in R Markdown.
a = sqrt(2)
1.4142135623730951
a = sqrt(2);
## And lots of different types of display are supported in JuliaCall.
## Like markdown.
@doc sqrt
sqrt(x)
Return $\sqrt{x}$. Throws
DomainError
for negativeReal
arguments. Use complex negative arguments instead. The prefix operator√
is equivalent tosqrt
.
And you can also get access to julia variables in R code chunk quite easily using JuliaCall
, for example:
## This is a R language chunk.
## In the previous julia chunk, we define variable a,
## we can use functions in JuliaCall to get access to it.
JuliaCall::julia_eval("a")
## [1] 1.414214
Currently only R Markdown html output is fully supported by JuliaCall
.
When using JuliaCall
in R Markdown, every julia display will be wrapped in a div with class = "JuliaDisplay"
, so you could customize the looking of julia display using css, for example, I use
<style>
.JuliaDisplay {
color: blue;
}
</style>
in this document.