Writing numerical values on the plot with Matplotlib
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.)?
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))
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()