
This examples demonstrates a polar area chart.
The polar area layer is created using PolarChart.addAreaLayer. In this example, 3 area layers are used. The area data are already stacked before passing to ChartDirector.
ChartDirector Ver 5.0 (Python Edition)
Polar Area Chart
Source Code Listing
#!/usr/bin/python from pychartdir import * # Data for the chart data0 = [5, 3, 10, 4, 3, 5, 2, 5] data1 = [12, 6, 17, 6, 7, 9, 4, 7] data2 = [17, 7, 22, 7, 18, 13, 5, 11] labels = ["North", "North<*br*>East", "East", "South<*br*>East", "South", "South<*br*>West", "West", "North<*br*>West"] # Create a PolarChart object of size 460 x 500 pixels, with a grey (e0e0e0) # background and 1 pixel 3D border c = PolarChart(460, 500, '0xe0e0e0', '0x000000', 1) # Add a title to the chart at the top left corner using 15pts Arial Bold Italic font. # Use a wood pattern as the title background. c.addTitle("Polar Area Chart Demo", "arialbi.ttf", 15).setBackground(c.patternColor( "wood.png")) # Set center of plot area at (230, 280) with radius 180 pixels, and white (ffffff) # background. c.setPlotArea(230, 280, 180, '0xffffff') # Set the grid style to circular grid c.setGridStyle(0) # Add a legend box at top-center of plot area (230, 35) using horizontal layout. Use # 10 pts Arial Bold font, with 1 pixel 3D border effect. b = c.addLegend(230, 35, 0, "arialbd.ttf", 9) b.setAlignment(TopCenter) b.setBackground(Transparent, Transparent, 1) # Set angular axis using the given labels c.angularAxis().setLabels(labels) # Specify the label format for the radial axis c.radialAxis().setLabelFormat("{value}%") # Set radial axis label background to semi-transparent grey (40cccccc) c.radialAxis().setLabelStyle().setBackground('0x40cccccc', 0) # Add the data as area layers c.addAreaLayer(data2, -1, "5 m/s or above") c.addAreaLayer(data1, -1, "1 - 5 m/s") c.addAreaLayer(data0, -1, "less than 1 m/s") # Output the chart c.makeChart("polararea.png") |
#!/usr/bin/python from pychartdir import * import os # Data for the chart data0 = [5, 3, 10, 4, 3, 5, 2, 5] data1 = [12, 6, 17, 6, 7, 9, 4, 7] data2 = [17, 7, 22, 7, 18, 13, 5, 11] labels = ["North", "North<*br*>East", "East", "South<*br*>East", "South", "South<*br*>West", "West", "North<*br*>West"] # Create a PolarChart object of size 460 x 500 pixels, with a grey (e0e0e0) # background and 1 pixel 3D border c = PolarChart(460, 500, '0xe0e0e0', '0x000000', 1) # Add a title to the chart at the top left corner using 15pts Arial Bold Italic font. # Use a wood pattern as the title background. c.addTitle("Polar Area Chart Demo", "arialbi.ttf", 15).setBackground(c.patternColor( os.path.join(os.path.dirname(sys.argv[0]), "wood.png"))) # Set center of plot area at (230, 280) with radius 180 pixels, and white (ffffff) # background. c.setPlotArea(230, 280, 180, '0xffffff') # Set the grid style to circular grid c.setGridStyle(0) # Add a legend box at top-center of plot area (230, 35) using horizontal layout. Use # 10 pts Arial Bold font, with 1 pixel 3D border effect. b = c.addLegend(230, 35, 0, "arialbd.ttf", 9) b.setAlignment(TopCenter) b.setBackground(Transparent, Transparent, 1) # Set angular axis using the given labels c.angularAxis().setLabels(labels) # Specify the label format for the radial axis c.radialAxis().setLabelFormat("{value}%") # Set radial axis label background to semi-transparent grey (40cccccc) c.radialAxis().setLabelStyle().setBackground('0x40cccccc', 0) # Add the data as area layers c.addAreaLayer(data2, -1, "5 m/s or above") c.addAreaLayer(data1, -1, "1 - 5 m/s") c.addAreaLayer(data0, -1, "less than 1 m/s") # Output the chart print("Content-type: image/png\n") binaryPrint(c.makeChart2(PNG)) |