ChartDirector 6.0 (Ruby Edition)

Scatter Chart




This example demonstrates a scatter chart created using XYChart.addScatterLayer.

Source Code Listing

[Ruby On Rails Version - Controller] app/controllers/scatter_controller.rb
require("chartdirector")

class ScatterController < ApplicationController

    def index()
        @title = "Scatter Chart"
        @ctrl_file = File.expand_path(__FILE__)
        @noOfCharts = 1
        render :template => "templates/chartview"
    end

    #
    # Render and deliver the chart
    #
    def getchart()
        # The XY points for the scatter chart
        dataX0 = [10, 15, 6, 12, 14, 8, 13, 13, 16, 12, 10.5]
        dataY0 = [130, 150, 80, 110, 110, 105, 130, 115, 170, 125, 125]

        dataX1 = [6, 12, 4, 3.5, 7, 8, 9, 10, 12, 11, 8]
        dataY1 = [65, 80, 40, 45, 70, 80, 80, 90, 100, 105, 60]

        # Create a XYChart object of size 450 x 420 pixels
        c = ChartDirector::XYChart.new(450, 420)

        # Set the plotarea at (55, 65) and of size 350 x 300 pixels, with a light grey border
        # (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color
        # (0xc0c0c0)
        c.setPlotArea(55, 65, 350, 300, -1, -1, 0xc0c0c0, 0xc0c0c0, -1)

        # Add a legend box at (50, 30) (top of the chart) with horizontal layout. Use 12pt Times
        # Bold Italic font. Set the background and border color to Transparent.
        c.addLegend(50, 30, false, "timesbi.ttf", 12).setBackground(ChartDirector::Transparent)

        # Add a title to the chart using 18pt Times Bold Itatic font.
        c.addTitle("Genetically Modified Predator", "timesbi.ttf", 18)

        # Add a title to the y axis using 12pt Arial Bold Italic font
        c.yAxis().setTitle("Length (cm)", "arialbi.ttf", 12)

        # Add a title to the x axis using 12pt Arial Bold Italic font
        c.xAxis().setTitle("Weight (kg)", "arialbi.ttf", 12)

        # Set the axes line width to 3 pixels
        c.xAxis().setWidth(3)
        c.yAxis().setWidth(3)

        # Add an orange (0xff9933) scatter chart layer, using 13 pixel diamonds as symbols
        c.addScatterLayer(dataX0, dataY0, "Genetically Engineered", ChartDirector::DiamondSymbol,
            13, 0xff9933)

        # Add a green (0x33ff33) scatter chart layer, using 11 pixel triangles as symbols
        c.addScatterLayer(dataX1, dataY1, "Natural", ChartDirector::TriangleSymbol, 11, 0x33ff33)

        # Output the chart
        send_data(c.makeChart2(ChartDirector::PNG), :type => "image/png", :disposition => "inline")

    end

end

[Ruby On Rails Version - View] app/views/templates/chartview.html.erb
<html>
<body style="margin:5px 0px 0px 5px">

<!-- Title -->
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    <%= @title %>
</div>
<hr style="border:solid 1px #000080" />

<!-- Source Code Listing Link -->
<div style="font-size:9pt; font-family:verdana; margin-bottom:1.5em">
    <%= link_to "Source Code Listing", 
        :controller => "cddemo", :action => "viewsource",
        :ctrl_file => @ctrl_file, :view_file => File.expand_path(__FILE__) %>
</div>

<!-- Create one or more IMG tags to display the demo chart(s) -->
<% 0.upto(@noOfCharts - 1) do |i| %>
    <img src="<%= url_for(:action => "getchart", :img => i) %>">
<% end %>

</body>
</html>

[Command Line Version] rubydemo/scatter.rb
#!/usr/bin/env ruby
require("chartdirector")

# The XY points for the scatter chart
dataX0 = [10, 15, 6, 12, 14, 8, 13, 13, 16, 12, 10.5]
dataY0 = [130, 150, 80, 110, 110, 105, 130, 115, 170, 125, 125]

dataX1 = [6, 12, 4, 3.5, 7, 8, 9, 10, 12, 11, 8]
dataY1 = [65, 80, 40, 45, 70, 80, 80, 90, 100, 105, 60]

# Create a XYChart object of size 450 x 420 pixels
c = ChartDirector::XYChart.new(450, 420)

# Set the plotarea at (55, 65) and of size 350 x 300 pixels, with a light grey border (0xc0c0c0).
# Turn on both horizontal and vertical grid lines with light grey color (0xc0c0c0)
c.setPlotArea(55, 65, 350, 300, -1, -1, 0xc0c0c0, 0xc0c0c0, -1)

# Add a legend box at (50, 30) (top of the chart) with horizontal layout. Use 12pt Times Bold Italic
# font. Set the background and border color to Transparent.
c.addLegend(50, 30, false, "timesbi.ttf", 12).setBackground(ChartDirector::Transparent)

# Add a title to the chart using 18pt Times Bold Itatic font.
c.addTitle("Genetically Modified Predator", "timesbi.ttf", 18)

# Add a title to the y axis using 12pt Arial Bold Italic font
c.yAxis().setTitle("Length (cm)", "arialbi.ttf", 12)

# Add a title to the x axis using 12pt Arial Bold Italic font
c.xAxis().setTitle("Weight (kg)", "arialbi.ttf", 12)

# Set the axes line width to 3 pixels
c.xAxis().setWidth(3)
c.yAxis().setWidth(3)

# Add an orange (0xff9933) scatter chart layer, using 13 pixel diamonds as symbols
c.addScatterLayer(dataX0, dataY0, "Genetically Engineered", ChartDirector::DiamondSymbol, 13,
    0xff9933)

# Add a green (0x33ff33) scatter chart layer, using 11 pixel triangles as symbols
c.addScatterLayer(dataX1, dataY1, "Natural", ChartDirector::TriangleSymbol, 11, 0x33ff33)

# Output the chart
c.makeChart("scatter.png")