Arbitrary XY Line Chart

[Ruby On Rails Version - Controller] app/controllers/xyline_controller.rb

require("chartdirector")

class XylineController < ApplicationController

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

    #
    # Render and deliver the chart
    #
    def getchart()
        # The (x, y) data for the first line
        dataX0 = [20, 90, 40, 30, 12]
        dataY0 = [10, 40, 75, 54, 20]

        # The (x, y) data for the second line
        dataX1 = [10, 40, 75, 54, 60]
        dataY1 = [50, 90, 40, 30, 10]

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

        # Set the plotarea at (55, 65) and of size 350 x 300 pixels, with white background and a
        # light grey border (0xc0c0c0). Turn on both horizontal and vertical grid lines with light
        # grey color (0xc0c0c0)
        c.setPlotArea(55, 65, 350, 300, 0xffffff, -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("Reaction Path", "timesbi.ttf", 18)

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

        # Set the y axis line width to 3 pixels
        c.yAxis().setWidth(3)

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

        # Set the x axis line width to 3 pixels
        c.xAxis().setWidth(3)

        # Add a red (0xff3333) line layer using dataX0 and dataY0
        layer1 = c.addLineLayer(dataY0, 0xff3333, "Compound AAA")
        layer1.setXData(dataX0)

        # Set the line width to 3 pixels
        layer1.setLineWidth(3)

        # Use 9 pixel square symbols for the data points
        layer1.getDataSet(0).setDataSymbol(ChartDirector::SquareSymbol, 9)

        # Add custom text labels to the first and last point on the scatter plot using Arial Bold
        # font
        layer1.addCustomDataLabel(0, 0, "Start", "arialbd.ttf")
        layer1.addCustomDataLabel(0, 4, "End", "arialbd.ttf")

        # Add a green (0x33ff33) line layer using dataX1 and dataY1
        layer2 = c.addLineLayer(dataY1, 0x33ff33, "Compound BBB")
        layer2.setXData(dataX1)

        # Set the line width to 3 pixels
        layer2.setLineWidth(3)

        # Use 11 pixel diamond symbols for the data points
        layer2.getDataSet(0).setDataSymbol(ChartDirector::DiamondSymbol, 11)

        # Add custom text labels to the first and last point on the scatter plot using Arial Bold
        # font
        layer2.addCustomDataLabel(0, 0, "Start", "arialbd.ttf")
        layer2.addCustomDataLabel(0, 4, "End", "arialbd.ttf")

        # 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/xyline.rb

#!/usr/bin/env ruby
require("chartdirector")

# The (x, y) data for the first line
dataX0 = [20, 90, 40, 30, 12]
dataY0 = [10, 40, 75, 54, 20]

# The (x, y) data for the second line
dataX1 = [10, 40, 75, 54, 60]
dataY1 = [50, 90, 40, 30, 10]

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

# Set the plotarea at (55, 65) and of size 350 x 300 pixels, with white background and a light grey
# border (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color
# (0xc0c0c0)
c.setPlotArea(55, 65, 350, 300, 0xffffff, -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("Reaction Path", "timesbi.ttf", 18)

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

# Set the y axis line width to 3 pixels
c.yAxis().setWidth(3)

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

# Set the x axis line width to 3 pixels
c.xAxis().setWidth(3)

# Add a red (0xff3333) line layer using dataX0 and dataY0
layer1 = c.addLineLayer(dataY0, 0xff3333, "Compound AAA")
layer1.setXData(dataX0)

# Set the line width to 3 pixels
layer1.setLineWidth(3)

# Use 9 pixel square symbols for the data points
layer1.getDataSet(0).setDataSymbol(ChartDirector::SquareSymbol, 9)

# Add custom text labels to the first and last point on the scatter plot using Arial Bold font
layer1.addCustomDataLabel(0, 0, "Start", "arialbd.ttf")
layer1.addCustomDataLabel(0, 4, "End", "arialbd.ttf")

# Add a green (0x33ff33) line layer using dataX1 and dataY1
layer2 = c.addLineLayer(dataY1, 0x33ff33, "Compound BBB")
layer2.setXData(dataX1)

# Set the line width to 3 pixels
layer2.setLineWidth(3)

# Use 11 pixel diamond symbols for the data points
layer2.getDataSet(0).setDataSymbol(ChartDirector::DiamondSymbol, 11)

# Add custom text labels to the first and last point on the scatter plot using Arial Bold font
layer2.addCustomDataLabel(0, 0, "Start", "arialbd.ttf")
layer2.addCustomDataLabel(0, 4, "End", "arialbd.ttf")

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