CODEWITHSUNDEEP
rshinyflexdashboard
Rieder
Rieder

Reputation: 1445

How to read uploaded file via Flexdashboard and Shiny

I want to create a web app using flexdashboard so that people can upload their CSV and see the visualization.

Right now, I am using a R markdown with flexdashboard template. Here is the file upload code.

{r, echo = FALSE}
fileInput("file1", "Choose CSV File",
                    multiple = TRUE,
                   accept = c("text/csv",
                            "text/comma-separated-values,text/plain",
                            ".csv"))

My question is: in this .rmd notebook, how can I access users' uploaded file and read it as dataframe?

Upvotes: 1

Views: 373

Answers (1)

lmeninato
lmeninato

Reputation: 462

The simplest way I know of is to do something like:

```{r, echo=FALSE}
library(shiny)

fileInput("file1", "Choose CSV File",
          multiple = TRUE,
          accept = c("text/csv",
                     "text/comma-separated-values,text/plain",
                     ".csv")
)

values <- reactiveValues(df_data = NULL)

observeEvent(input$file1, {
  values$df_data <- read.csv(input$file1$datapath)
})


renderTable(values$df_data)

```

You can really do whatever you'd like in that observeEvent expression (i.e. data validation, filter, transform, etc.).

Upvotes: 1

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