A floating bar chart plugin for raphael.js developed for one of our clients.

View test.html to see it in action.

Usage:

r.g.floatingBarChart(x, y, width, height, [
                {startPoint: -10, tallness: 15, gradientString: "135-#123-#321", name: "foo"}, 
                {startPoint: 10, tallness: 12, gradientString: "135-#456-#654", name: "bar"}, 
                {startPoint: 15, tallness: 6, gradientString: "135-#789-#987", name: "biz"}, 
                {startPoint: 14, tallness: 10, gradientString: "135-#fff-#000", name: "baz"}, 
                {startPoint: 16, tallness: 4, gradientString: "135-#169-#947", name: "fox"}
            ], 
        {
            backgroundGradient: "90-#eee-#fff", 
            gridHeight: 30, 
            axisWidth: 20, 
            axisFontSize: 10, 
            chartFontSize: 10,
            chartFontMargin: 10,
            barsSideMargin: 20,
            barWidth: 30,
            fontFace: "Arial",
            fontSize: 12,
            fontLineHeight: 14
        }
    );

//          x, y: offset in pixels relative to the current paper instance
//          width, height: size of the chart. must be expressed as integer value, represents value in pixels.
//          values: array of bar items. an array item contains an object as: {startPoint: integer, tallness: integer, gradientString: string of gradient}
//          options: object containing options. Most notably:
//                  options.backgroundGradient: string representing the gradient to use
//                  options.gridHeight: integer representing the distance in pixels between two lines or two entries on the axis. Chart height MUST be divisible by this number.
//                  options.axisWidth: integer representing the width in pixels of the axis
//                  options.axisFontSize: integer representing the axis font size in pixels
//                  options.chartFontSize: integer representing the font size used under the charts in pixels
//                  options.chartFontMargin: integer representing margin of the font relative to the bottom of a bar and to the bottom of itself [basically margin-top, margin-bottom]
//                  options.barsSideMargin: integer representing margin in pixels of the LEFT and RIGHT sides of the bar GROUP. think of all bars contained in a div, and apply a margin to that.
//                  options.barWidth: integer representing the width of a bar in pixels