This example demonstrates the basic steps in creating bar charts.
- Create an XYChart object using XYChart.XYChart.
- Specify the plot area of the chart using XYChart.setPlotArea. The plot area is the rectangle bounded by the x and y axes. You should leave some margin on the outside of the plot area for axis labels, chart titles, etc.
- Specify the labels on the x-axis using Axis.setLabels.
- Add a bar layer and specify the data for the bars using XYChart.addBarLayer.
- Generate the chart using BaseChart.makeChart.
[Standalone Version] pythondemo\simplebar.py
#!/usr/bin/python
from pychartdir import *
# The data for the bar chart
data = [85, 156, 179.5, 211, 123]
# The labels for the bar chart
labels = ["Mon", "Tue", "Wed", "Thu", "Fri"]
# Create a XYChart object of size 250 x 250 pixels
c = XYChart(250, 250)
# Set the plotarea at (30, 20) and of size 200 x 200 pixels
c.setPlotArea(30, 20, 200, 200)
# Add a bar chart layer using the given data
c.addBarLayer(data)
# Set the labels on the x axis.
c.xAxis().setLabels(labels)
# output the chart
c.makeChart("simplebar.png") |
[CGI Version] pythondemo_cgi\simplebar.py
#!/usr/bin/python
from pychartdir import *
# The data for the bar chart
data = [85, 156, 179.5, 211, 123]
# The labels for the bar chart
labels = ["Mon", "Tue", "Wed", "Thu", "Fri"]
# Create a XYChart object of size 250 x 250 pixels
c = XYChart(250, 250)
# Set the plotarea at (30, 20) and of size 200 x 200 pixels
c.setPlotArea(30, 20, 200, 200)
# Add a bar chart layer using the given data
c.addBarLayer(data)
# Set the labels on the x axis.
c.xAxis().setLabels(labels)
# output the chart
print "Content-type: image/png\n"
binaryPrint(c.makeChart2(PNG)) |
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