R shiny with mathjax conditional cases

Question

Hi I am aware that you can have inline equations in an R-shiny app using the withMathJax function, but from what I have seen it is simple math equations that you can use like at the Rshiny examples here. I was wondering if any one new how to add conditional cases, as you would in latex with the following code

f(n) =
\begin{cases}
n/2,  & \text{if $n$ is even} \\
3n+1, & \text{if $n$ is odd}
\end{cases}

which would produce the below, cheers

Answer 1

I think thats what you want or?

library(shiny)

ui <- {fluidPage(
  title = 'MathJax Examples',
  withMathJax(),
  uiOutput('ex4')
  )}

server <- function(input, output, session) {
  output$ex4 <- renderUI({
    withMathJax(
      helpText('$$f(n)=\\begin{cases}
               n/2,  & \\text{if $n$ is even} \\\\
               3n+1, & \\text{if $n$ is odd}
               \\end{cases}\\!$$'))
  })
}
shinyApp(ui, server)