ChartDirector 7.0 (Python Edition)

Multi-Line Chart (1)




This example demonstrates a chart with multiple lines of different styles. It also demonstrates using frame with rounded corners, title with glass shading effect, both vertical and horizontal grid lines, and a legend at the top of the plot area.

Source Code Listing

pythondemo\multiline.py
#!/usr/bin/python # The ChartDirector for Python module is assumed to be in "../lib" import sys, os sys.path.insert(0, os.path.join(os.path.abspath(sys.path[0]), "..", "lib")) from pychartdir import * # The data for the line chart data0 = [42, 49, 33, 38, 51, 46, 29, 41, 44, 57, 59, 52, 37, 34, 51, 56, 56, 60, 70, 76, 63, 67, 75, 64, 51] data1 = [50, 55, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67, 67, 58, 59, 73, 77, 84, 82, 80, 84, 98] data2 = [36, 28, 25, 33, 38, 20, 22, 30, 25, 33, 30, 24, 28, 15, 21, 26, 46, 42, 48, 45, 43, 52, 64, 60, 70] # The labels for the line chart labels = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24"] # Create an XYChart object of size 600 x 300 pixels, with a light blue (EEEEFF) background, black # border, 1 pxiel 3D border effect and rounded corners c = XYChart(600, 300, 0xeeeeff, 0x000000, 1) c.setRoundedFrame() # Set the plotarea at (55, 58) and of size 520 x 195 pixels, with white background. Turn on both # horizontal and vertical grid lines with light grey color (0xcccccc) c.setPlotArea(55, 58, 520, 195, 0xffffff, -1, -1, 0xcccccc, 0xcccccc) # Add a legend box at (50, 30) (top of the chart) with horizontal layout. Use 9pt Arial Bold font. # Set the background and border color to Transparent. c.addLegend(50, 30, 0, "Arial Bold", 9).setBackground(Transparent) # Add a title box to the chart using 15pt Times Bold Italic font, on a light blue (CCCCFF) # background with glass effect. white (0xffffff) on a dark red (0x800000) background, with a 1 pixel # 3D border. c.addTitle("Application Server Throughput", "Times New Roman Bold Italic", 15).setBackground( 0xccccff, 0x000000, glassEffect()) # Add a title to the y axis c.yAxis().setTitle("MBytes per hour") # Set the labels on the x axis. c.xAxis().setLabels(labels) # Display 1 out of 3 labels on the x-axis. c.xAxis().setLabelStep(3) # Add a title to the x axis c.xAxis().setTitle("Jun 12, 2006") # Add a line layer to the chart layer = c.addLineLayer2() # Set the default line width to 2 pixels layer.setLineWidth(2) # Add the three data sets to the line layer. For demo purpose, we use a dash line color for the last # line layer.addDataSet(data0, 0xff0000, "Server #1") layer.addDataSet(data1, 0x008800, "Server #2") layer.addDataSet(data2, c.dashLineColor(0x3333ff, DashLine), "Server #3") # Output the chart c.makeChart("multiline.png")