web applications - Shiny output and R MarkDown render_site() -

i'm facing issue regarding use of shiny outputs in r markdown document when trying export two-paged site through use of render_site() (rmarkdown package)

here's chunk of code create issue (located within knitr or 1 of .rmd documents):

uioutput("main")  output$main <- renderui({   if(test$n != 0){     plotoutput("mainplot", height = test$n*length(input$yaxes)*400)   } })  output$mainplot <- renderplot({do.call("grid.arrange", c(test$plots, ncol = 1))}) 

when processing, render_site() tells me "output" object not defined. running .rmd file alone works fine; issue appears when trying include website. finally, website created when remove lines above.

are output$foo not supported r markdown or missing dumb?

thank in advance,

regards, paul

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ps: searched before asking, i've been trying figure out hours ._.

have tried putting output-generating code function?

server <- function (input, output) {     output$main <- renderui({     if(test$n != 0){     plotoutput("mainplot", height = test$n*length(input$yaxes)*400)     }    })      output$mainplot <- renderplot({do.call("grid.arrange", c(test$plots, ncol = 1))}) }