dashR

r

在R中创建美丽的分析Web应用程序。

文档|画廊

安装

https://dash.plotly.com/r/installation

？确保您至少使用R的3.0.2版。您可以通过在R CLI中输入version看到哪个版本的R。 Cran是下载最新R版本的最简单的地方。

截至2020-06-04， DASH和当前发布的所有核心组件库的版本都可以通过Cran下载！安装dash及其依赖性很简单

install.packages( " dash " )

希望安装包装的（稳定）开发版本以及GitHub的DASH组件的用户可以使用install_github并指定开发分支：

install.packages(c( " fiery " , " routr " , " reqres " , " htmltools " , " base64enc " , " plotly " , " mime " , " crayon " , " devtools " ))

# installs dash, which includes dashHtmlComponents, dashCoreComponents, and dashTable
# and will update the component libraries when a new package is released
devtools :: install_github( " plotly/dashR " , ref = " dev " , upgrade = TRUE )

然后，将包装加载到R中：

library( dash )

就是这样！

入门

https://dash.plotly.com/r/layout

R软件包破折号使得创建由R驱动的反应性Web应用程序，它提供了一个名为Dash的R6类，该类别可以通过new()方法初始化。

library( dash )

app <- Dash $ new()

类似于Python的Dash和Julia的Dash，R应用程序的每个DASH都需要布局（即，用户界面）和回调功能的集合，这些功能定义了更新逻辑时要在输入值更改时执行的更新逻辑。以格式化字符串的基本示例为例：

library( dash )

dash_app() % > %
  set_layout(
    dccInput( id = " text " , " sample " ),
    div( " CAPS: " , span( id = " out1 " )),
    div( " small: " , span( id = " out2 " ))
  ) % > %
  add_callback(
    list (
      output( " out1 " , " children " ),
      output( " out2 " , " children " )
    ),
    input( " text " , " value " ),
    function ( text ) {
      list (
        toupper( text ),
        tolower( text )
      )
    }
  ) % > %
  run_app()

在这里， showcase = TRUE参数打开一个浏览器窗口，并自动为您加载仪表板应用。

Hello World示例使用dccGraph

library( dash )

# Create a Dash app
app <- dash_app()

# Set the layout of the app
app % > % set_layout(
  h1( ' Hello Dash ' ),
  div( " Dash: A web application framework for your data. " ),
  dccGraph(
    figure = list (
      data = list (
        list (
          x = list ( 1 , 2 , 3 ),
          y = list ( 4 , 1 , 2 ),
          type = ' bar ' ,
          name = ' SF '
        ),
        list (
          x = list ( 1 , 2 , 3 ),
          y = list ( 2 , 4 , 5 ),
          type = ' bar ' ,
          name = ' Montr U {00E9}al '
        )
      ),
      layout = list ( title = ' Dash Data Visualization ' )
    )
  )
)

# Run the app
app % > % run_app()

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“ Hello World”应用的屏幕截图