Plot wordcloud2 in shiny

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在使用shiny展示wordcloud2 的云词时，不能再使用传统的plotOutput和renderPlot函数了，应该使用对应的。

wordcloud2Output和renderWordcloud2函数，如下面介绍的：

Description

Function for plotting wordcloud2 in shiny

Usage

wordcloud2Output(outputId, width = "100%", height = "400px")renderWordcloud2(expr, env = parent.frame(), quoted = FALSE)wordcloud2Output(outputId, width = "100%", height = "400px")renderWordcloud2(expr, env = parent.frame(), quoted = FALSE)

Arguments

outputId

output variable to read from

width, height

Must be a valid CSS unit (like "100%", "400px", "auto") or a number, which will be coerced to a string and have "px" appended.

expr

An expression that generates a networkD3 graph

env

The environment in which to evaluate expr.

quoted

Is expr a quoted expression (with quote())? This is useful if you want to save an expression in a variable.

Details

Use renderWordcloud2 to render an wordcloud2 object and use wordcloud2Output output an wordcloud2 object. See more details in shiny package.

wordcloud2使用方法：

http://blog.csdn.net/sinat_26917383/article/details/51620019

wordcloud2实例：

http://www.th7.cn/web/js/201606/172864.shtml

wordcloud2官方文档：

https://cran.r-project.org/web/packages/wordcloud2/wordcloud2.pdf

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