Now that you have learned how simple it is to plot a simple graph, you might be wanting to plot from a file. The following method of plotting from a file is not the most efficient, but it is simple and easy to understand. If you already know more advanced I/O methods, feel free to use them instead of thee simple ones used here.
Let us just use some simple data like:
Save this as SampleData.txt in the same directory as your current Python script.
1,5 2,2 3,7 4,9 5,3 6,2 7,8 8,4 9,1
Now, we can do the following:
import matplotlib.pyplot as plt x =  y =  readFile = open('SampleData.txt','r') sepFile = readFile.read().split('\n') readFile.close() for plotPair in sepFile: xAndY = plotPair.split(',') x.append(int(xAndY)) y.append(int(xAndY)) plt.plot(x,y) plt.title('Matplotlib Graph') plt.xlabel('x axis label') plt.ylabel('y axis label') plt.show()