Wordcloud2 introduction"

This is an introduction to wordcloud2 package. This package provides an HTML5 interface to wordcloud for data visualization. Timdream's wordcloud2.js is used in this package. png

This document show two main function in Wordcloud2:

  1. wordcloud2: provide traditional wordcloud with HTML5
  2. letterCloud: provide wordcloud with selected word(letters).

install wordcloud2

You may have installed this package. Well, I still want to leave these codes here for installing.

require(devtools)
install_github("lchiffon/wordcloud2")

wordlcoud2 function

You can use wordcloud directly:

library(wordcloud2)
wordcloud2(data = demoFreq)

demoFreq is a data.frame including word and freq in each column.

head(demoFreq)

Parameters

Example1: use color and backgroundcolor

wordcloud2(demoFreq, color = "random-light", backgroundColor = "grey")

png

Example2: use rotations

wordcloud2(demoFreq, minRotation = -pi/6, maxRotation = -pi/6, minSize = 10,
  rotateRatio = 1)

Example3: use figure file as a mask.

For example, t.png is A BIRD with black and white: png

figPath = system.file("examples/t.png",package = "wordcloud2")
wordcloud2(demoFreq, figPath = figPath, size = 1.5,color = "skyblue")

png

letterCloud function

letterCloud provide the function to create a wordcloud with a word, like this:

letterCloud(demoFreq, word = "R", size = 2)

png

Or:

letterCloud(demoFreq, word = "WORDCLOUD2", wordSize = 1)

png wordcloud with fig and letterCloud may disappeared in Rstudio Viewer, open into brower when you meet this bug

Parameters

shiny

See Example:

if(require(shiny)){
  library(wordcloud2)
   # Global variables can go here
   n <- 1

   # Define the UI
   ui <- bootstrapPage(
      numericInput('size', 'Size of wordcloud', n),
     wordcloud2Output('wordcloud2')
   )


   # Define the server code
   server <- function(input, output) {
      output$wordcloud2 <- renderWordcloud2({
      # wordcloud2(demoFreqC, size=input$size)
        wordcloud2(demoFreq, size=input$size)
      })
   }
   # Return a Shiny app object
   # Sys.setlocale("LC_CTYPE","chs") #if you use Chinese character
   ## Do not Run!
   shinyApp(ui = ui, server = server)
   }


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wordcloud2 documentation built on May 1, 2019, 7:16 p.m.