CODEWITHSUNDEEP
rshiny
SixSigma
SixSigma

Reputation: 3260

R shiny app cannot find local loaded data. Why?

I am new to R shiny, and got some issues regarding loading data.

In my server.R, I have some code to source R utility functions and R data. I put the data files in a subdirectory data under the shiny app.

source("utilities.R")
load("data/mydata.RData")

The structure of my shinyServer looks like following:

shinyServer(function(input, output, session) {

  ## ...

  ## I have a action Button, Run, to start model fitting
  main_plot <- eventReactive(input$run, {

    fit <- main.shiny()

    post_analysis_shiny(fit = fit)

  })

  main.shiny <- function() {
    ## get input, fit model
    ## main.fit() is a function in utilities.R, which requires data saved in mydata.RData
    fit <- main.fit()

    fit

  }

})

When I Run App, shiny cannot find the data. But if I manually load the data before I run shiny, everything works fine. What is the problem here? Thank you very much.

Upvotes: 2

Views: 2121

Answers (1)

tokiloutok
tokiloutok

Reputation: 467

I suppose you are using Rstudio.

When you load and source "manually" in you R Rstudio session, data and functions are avaialble to shiny.

Otherwise to add on Jimbou answer : You should have in your shiny folder :

shinyappp
--- global.R
--- ui.R
--- server.R
--- utilisties.R
--- data

In global.R : you have :

 source("utilities.R")
 load("data/mydata.RData")

Upvotes: 3

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