README.md

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listviewer

A package of R htmlwidgets to interactively view and maybe modify lists. As of now, listviewer provides an interface to jsoneditor and react-json-view. listviewer is designed to support multiple interfaces.

install

CRAN

install.packages("listviewer")

Development Version

devtools::install_github("timelyportfolio/listviewer")

jsoneditor

jsoneditor is a really well designed JSON interactive editor by Jos de Jong. Since most R data can be represented in JSON, we can use this great JavaScript library in R.

# using the data from the jsoneditor simple example
#  in R list form

library(listviewer)

jsonedit(
  list(
    array = c(1,2,3)
    ,boolean = TRUE
    ,null = NULL
    ,number = 123
    ,object = list( a="b", c="d" )
    ,string = "Hello World"
  )
)
# also works with data.frames
jsonedit( mtcars )
# helpful interactive view of par
jsonedit( par() )
# meta view of the above
jsonedit(jsonedit(par()))

See the above interactive view of par for yourself.

I got this idea courtesy of @jasonpbecker on Twitter. htmlwidgets dependencies are defined by YAML. Let's see the dependencies for jsonedit.

jsonedit(
  yaml.load_file(system.file("htmlwidgets/jsonedit.yaml",package="listviewer"))
)

How about topojson?

### experiment with topojson
library(httr)
library(pipeR)
library(listviewer)

# topojson for Afghanistan
url_path = "https://gist.githubusercontent.com/markmarkoh/8856417/raw/6178d18115d9f273656d294a867c3f83b739a951/customAfghanMap.topo.json"

url_path %>>% 
  GET %>>%
  content( as = "text") %>>%
  jsonedit

reactjson

react-json-view is another very nice JSON interactive editor. We even get copy/paste! All of the above examples should also work with reactjson.

# using the data from the jsoneditor simple example
#  in R list form

library(listviewer)

reactjson(
  list(
    array = c(1,2,3)
    ,boolean = TRUE
    ,null = NULL
    ,number = 123
    ,object = list( a="b", c="d" )
    ,string = "Hello World"
  )
)

Shiny example

listviewer works with Shiny but the implementation is crude and likely to change. Here is an example. If you really want to use it, I would recommend debouncing the change callback.

library(shiny)
library(listviewer)

# put some data in environment so it will show up
data(mtcars)

ui <- shinyUI(
  fluidPage(
    jsoneditOutput( "jsed" )
  )
)

server <- function(input,output){
  output$jsed <- renderJsonedit({
    jsonedit(
      as.list( .GlobalEnv )
      ,"change" = htmlwidgets::JS('function(){
        console.log( event.currentTarget.parentNode.editor.get() )
      }')
    )

  })
}

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

code of conduct

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.



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listviewer documentation built on April 1, 2018, 12:23 p.m.