ChartDirector Ver 3.0 (Python Edition)

Depth Bar Chart




ChartDirector allows a XY chart to containing multiple layers of the same or different types. In this example, all layers are 3D bar layers. The bars are drawn in semi-transparent colors to avoid the bars on the front hiding the bars at the back.

Source Code Listing

[File: pythondemo/depthbar.py] (The CGI version is available as "pythondemo_cgi/depthbar.py".)
#!/usr/bin/python from pychartdir import * #The data for the bar chart data0 = [100, 125, 245, 147, 67] data1 = [85, 156, 179, 211, 123] data2 = [97, 87, 56, 267, 157] #The labels for the bar chart labels = ["Mon", "Tue", "Wed", "Thu", "Fri"] #Create a XYChart object of size 500 x 320 pixels c = XYChart(500, 320) #Set the plotarea at (100, 40) and of size 280 x 240 pixels c.setPlotArea(100, 40, 280, 240) #Add a legend box at (405, 100) c.addLegend(405, 100) #Add a title to the chart c.addTitle("Weekday Network Load") #Add a title to the y axis. Draw the title upright (font angle = 0) c.yAxis().setTitle("Average\nWorkload\n(MBytes\nPer Hour)").setFontAngle(0) #Set the labels on the x axis c.xAxis().setLabels(labels) #Add three bar layers, each representing one data set. The bars are drawn in #semi-transparent colors. c.addBarLayer(data0, 0x808080ff, "Server # 1", 5) c.addBarLayer(data1, 0x80ff0000, "Server # 2", 5) c.addBarLayer(data2, 0x8000ff00, "Server # 3", 5) #output the chart c.makeChart("depthbar.png")