Upload data file and run source.R in Shiny app

Question

I am trying to run my shinyapp.R (includes ui and server) using source("model.R"). I want to let a user upload a data file and run model.R in my shinyapp.R.

How should I let model.R run using user uploaded data set. It does not read the dataset I uploaded from the shiny app.

My code:

source("model.R")

server <- function(input, output){
                   dataset <- reactive({
                                        infile  <- input$datafile
                                        if( is.null(infile) ) {
                                              return(NULL)
                                        } else { 
                                              as.data.frame(read.csv(infile$datapath, header=TRUE))      
                                        } 
                                        })    

                  output$plot <- renderPlot({pred_plot})
                  })

ui <- fluidPage(fileInput("datafile", "Choose data file", accept = c('text/csv','.csv','.xlsx') ),    
                 mainPanel(plotOutput("plot") 
                )

runApp(list(ui = ui, server = server))

I get the following error message:

Error in eval(ei, envir) : object 'dataset' not found

did you just code line every line one by one?

Rana Usman
– Rana Usman

2018-07-11 07:38:24 +00:00
Commented Jul 11, 2018 at 7:38 — Rana Usman
– Rana Usman, Commented Jul 11, 2018 at 7:38

NiroshaR · Accepted Answer · 2018-07-12 18:56:51Z

1

I was able to figure it out, I save necessary functions as R objects and call it in shiny app. That way, you can render things as needed.

answered Jul 12, 2018 at 18:56

NiroshaR

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