Writing numerical values on the plot with Matplotlib

Question

Is it possible, with Matplotlib, to print the values of each point on the graph?

For example, if I have:

x = numpy.range(0,10) y = numpy.array([5,3,4,2,7,5,4,6,3,2]) pyplot.plot(x,y) 

How can I display y values on the plot (e.g. print a 5 near the (0,5) point, print a 3 near the (1,3) point, etc.)?

Answer 1

You can use the annotate command to place text annotations at any x and y values you want. To place them exactly at the data points you could do this

import numpy from matplotlib import pyplot  x = numpy.arange(10) y = numpy.array([5,3,4,2,7,5,4,6,3,2])  fig = pyplot.figure() ax = fig.add_subplot(111) ax.set_ylim(0,10) pyplot.plot(x,y) for i,j in zip(x,y):     ax.annotate(str(j),xy=(i,j))  pyplot.show() 

If you want the annotations offset a little, you could change the annotate line to something like

ax.annotate(str(j),xy=(i,j+0.5)) 

Answer 2

Use pyplot.text() (import matplotlib.pyplot as plt)

import matplotlib.pyplot as plt  x=[1,2,3] y=[9,8,7]  plt.plot(x,y) for a,b in zip(x, y):      plt.text(a, b, str(b)) plt.show()