Adding word sources

Case Studies: Building Web Applications with Shiny in R

Dean Attali

Shiny Consultant

Textarea inputs

data argument is text, use textInput()?
textAreaInput() similar, but provides multiple rows
```
textAreaInput(inputId, label, value, rows, ...)
```

chapter4_2_adding_word_sources.005_b.png

File inputs - UI

File inputs for uploading a (text) file to Shiny app

fileInput(inputId, label, ...)

chapter4_2_adding_word_sources.011.png

File inputs - UI

chapter4_2_adding_word_sources.013.png

?fileInput() for more options

File inputs - server

After selecting a file, it gets uploaded and available to Shiny
Text inputs: input$<inputId> is text
Numeric inputs: input$<inputId> is a number
File inputs: input$<inputId> is NOT a file

File inputs - server

File inputs: input$<inputId> is dataframe with 1 row per file
- Variables: name, size, type, datapath
```
   name        size   type         datapath
1  myfile.txt  6000   text/plain   C:/path/to/temporary/file/0.txt
```
- datapath is most important: path of file

Read selected file:

  input$<inputId>$datapath

Text file:
```
readLines(input$<inputId>$datapath)
```

Let's practice!

Case Studies: Building Web Applications with Shiny in R

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