ChartDirector Ver 3.0 (Python Edition)

Rotated Area Chart




This example demonstrates swapping the x and y axes to produce an rotated area chart in which the area goes from left to right (instead of bottom to top).

The x and y axes in the example are configured as follows:

The area in this chart is filled using a gradient color created with BaseChart.gradientColor.

Source Code Listing

[File: pythondemo/rotatedarea.py] (The CGI version is available as "pythondemo_cgi/rotatedarea.py".)
#!/usr/bin/python from pychartdir import * #The data for the area chart data = [30, 28, 40, 55, 75, 68, 54, 60, 50, 62, 75, 65, 75, 89, 60, 55, 53, 35, 50, 66, 56, 48, 52, 65, 62] #The labels for the area chart labels = ["0 m", "", "", "3 m", "", "", "6 m", "", "", "9 m", "", "", "12 m", "", "", "15 m", "", "", "18 m", "", "", "21 m", "", "", "24 m"] #Create a XYChart object of size 320 x 320 pixels c = XYChart(320, 320) #Swap the x and y axis to become a rotated chart c.swapXY() #Set the y axis on the top side (right + rotated = top) c.setYAxisOnRight() #Reverse the x axis so it is pointing downwards c.xAxis().setReverse() #Set the plotarea at (50, 50) and of size 200 x 200 pixels. Enable horizontal #and vertical grids by setting their colors to grey (0xc0c0c0). c.setPlotArea(50, 50, 250, 250).setGridColor(0xc0c0c0, 0xc0c0c0) #Add a line chart layer using the given data c.addAreaLayer(data, c.gradientColor(50, 0, 300, 0, 0xffffff, 0xff)) #Set the x axis labels using the given labels c.xAxis().setLabels(labels) #Add a title to the x axis c.xAxis().setTitle("Depth") #Add a title to the y axis c.yAxis().setTitle("Carbon Dioxide Concentration (ppm)") #output the chart c.makeChart("rotatedarea.png")