

In [16]:

    
import numpy as np
import matplotlib

np.__version__,matplotlib.__version__









    Out[16]:





('1.14.5', '2.1.0')



In [8]:

    
np.random.seed(42)

add text to plot



In [25]:

    
import matplotlib.pyplot as plt
import numpy as np

plt.clf()

# using some dummy data for this example
xs = np.arange(0,10,1)
ys = np.random.normal(loc=2.0, scale=0.8, size=10)

plt.plot(xs,ys)

# text start at point (2,4)
plt.scatter([2],[4])
plt.text(2,4,'This text starts at point (2,4)')

plt.scatter([8],[3])
plt.text(8,3,'This text ends at point (8,3)',horizontalalignment='right')


plt.xticks(np.arange(0,10,1))
plt.yticks(np.arange(0,5,0.5))

plt.show()

add labels to line plots



In [9]:

    
import matplotlib.pyplot as plt


plt.clf()

# using some dummy data for this example
xs = np.arange(0,10,1)
ys = np.random.normal(loc=3, scale=0.4, size=10)

# 'bo-' means blue color, round points, solid lines
plt.plot(xs,ys,'bo-')

# zip joins x and y coordinates in pairs
for x,y in zip(xs,ys):
    
    label = "{:.2f}".format(y)
    
    plt.annotate(label, # this is the text
                 (x,y), # this is the point to label
                 textcoords="offset points", # how to position the text
                 xytext=(0,10), # distance from text to points (x,y)
                 ha='center') # horizontal alignemtn can be left, right or center

plt.xticks(np.arange(0,10,1))
plt.yticks(np.arange(0,7,0.5))

plt.show()

add labels to bar plots



In [10]:

    
import matplotlib.pyplot as plt
import numpy as np

plt.clf()

# using some dummy data for this example
xs = np.arange(0,10,1)
ys = np.random.normal(loc=3, scale=0.4, size=10)

plt.bar(xs,ys)

# zip joins x and y coordinates in pairs
for x,y in zip(xs,ys):
    
    label = "{:.2f}".format(y)
    
    plt.annotate(label, # this is the text
                 (x,y), # this is the point to label
                 textcoords="offset points", # how to position the text
                 xytext=(0,10), # distance from text to points (x,y)
                 ha='center') # horizontal alignemtn can be left, right or center

plt.xticks(np.arange(0,10,1))
plt.yticks(np.arange(0,5,0.5))

plt.show()

Add labels to scatter plot points



In [11]:

    
import matplotlib.pyplot as plt
import numpy as np

plt.clf()

# using some dummy data for this example
xs = np.random.normal(loc=4, scale=2.0, size=10)
ys = np.random.normal(loc=2.0, scale=0.8, size=10)

plt.scatter(xs,ys)

# zip joins x and y coordinates in pairs
for x,y in zip(xs,ys):
    
    label = "{:.2f}".format(y)
    
    plt.annotate(label, # this is the text
                 (x,y), # this is the point to label
                 textcoords="offset points", # how to position the text
                 xytext=(0,10), # distance from text to points (x,y)
                 ha='center') # horizontal alignment can be left, right or center

plt.xticks(np.arange(0,10,1))
plt.yticks(np.arange(0,5,0.5))

plt.show()



In [ ]: