Surface Chart (1)

This example demonstrates the basic steps in creating surface charts.

Create a SurfaceChart object using SurfaceChart.SurfaceChart.
Specify the position and size of the plot region using ThreeDChart.setPlotRegion.
Set data to the chart using SurfaceChart.setData.
Interpolate the data using SurfaceChart.setInterpolation for extra smoothness of the surface.
Set the position of the color axis (the color legend) using ThreeDChart.setColorAxis.
Add chart and axis titles using BaseChart.addTitle and Axis.setTitle.
Generate the chart using BaseChart.makeChart.

pythondemo\surface.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 *
import math

# The x and y coordinates of the grid
dataX = [-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
dataY = [-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

# The values at the grid points. In this example, we will compute the values using the formula z = x
# * sin(y) + y * sin(x).
dataZ = [0] * (len(dataX) * len(dataY))
for yIndex in range(0, len(dataY)) :
    y = dataY[yIndex]
    for xIndex in range(0, len(dataX)) :
        x = dataX[xIndex]
        dataZ[yIndex * len(dataX) + xIndex] = x * math.sin(y) + y * math.sin(x)

# Create a SurfaceChart object of size 720 x 600 pixels
c = SurfaceChart(720, 600)

# Add a title to the chart using 20 points Times New Roman Italic font
c.addTitle("Surface Energy Density   ", "Times New Roman Italic", 20)

# Set the center of the plot region at (350, 280), and set width x depth x height to 360 x 360 x 270
# pixels
c.setPlotRegion(350, 280, 360, 360, 270)

# Set the data to use to plot the chart
c.setData(dataX, dataY, dataZ)

# Spline interpolate data to a 80 x 80 grid for a smooth surface
c.setInterpolation(80, 80)

# Add a color axis (the legend) in which the left center is anchored at (645, 270). Set the length
# to 200 pixels and the labels on the right side.
c.setColorAxis(645, 270, Left, 200, Right)

# Set the x, y and z axis titles using 10 points Arial Bold font
c.xAxis().setTitle("X (nm)", "Arial Bold", 10)
c.yAxis().setTitle("Y (nm)", "Arial Bold", 10)
c.zAxis().setTitle("Energy Density (J/m<*font,super*>2<*/font*>)", "Arial Bold", 10)

# Output the chart
c.makeChart("surface.jpg")