jquery Knob HTML Widget.

This is an experimental R package that provides a jquery Knob html widget for R.

You can install it from github.

library(devtools) install_github('rstudio/htmltools') install_github('ramnathv/htmlwidgets') install_github('htmlwidgets/knob') Usage

Let us first create a simple knob.

library(knob) knob(value = 20, min = 0, max = 100, angleArc = 250, angleOffset = -125, fgColor = "#66CC66")

We can also use it in a Shiny application.

library(shiny) library(knob) ui = shinyUI(fluidPage( sliderInput('value', 'Value', 0, 200, 50), sliderInput('angleArc', 'Arc Angle', 0, 360, 250), knobOutput('gauge') )) server = function(input, output){ output$gauge <- renderKnob(knob( value = input$value, min = 0, max = 200, angleArc = input$angleArc, fgColor="#66CC66" )) } shinyApp(ui = ui, server = server)

The knob package makes use of the htmlwidgets package that makes it super-simple to package any HTML widget for R. Please read this to get a better sense on how the htmlwidgets package can make your life easier!