Python - How To Show Values On Top Of Bar Plot
Solution 1:
Simply add
for i, v in enumerate(y):
plt.text(xlocs[i] - 0.25, v + 0.01, str(v))
before plt.show()
. You can adjust the centralization or height of the text by changing the (-0.25) and (0.01) values, respectively.
Solution 2:
plt.text()
will allow you to add text to your chart. It only enables you to add text to one set of coordinates at a time, so you'll need to loop through the data to add text for each bar.
Below are the main adjustments I made to your code:
# assign your bars to a variable so their attributes can be accessed
bars = plt.bar(x, height=y, width=.4)
# access the bar attributes to place the text in the appropriate location
for bar in bars:
yval = bar.get_height()
plt.text(bar.get_x(), yval + .005, yval)
I added .005
to the y-value so that the text would be placed above the bar. This can be modified to obtain the appearance you are looking for.
Below is a full working example based on the original code. I made a few modifications to make it less brittle as well:
import matplotlib.pyplot as plt
# set the initial x-values to what you are wanting to plot
x=[i/2 for i in range(10)]
y=[0.95,
0.95,
0.89,
0.8,
0.74,
0.65,
0.59,
0.51,
0.5,
0.48]
bars = plt.bar(x, height=y, width=.4)
xlocs, xlabs = plt.xticks()
# reference x so you don't need to change the range each time x changes
xlocs=[i for i in x]
xlabs=[i for i in x]
plt.xlabel('Max Sigma')
plt.ylabel('Test Accuracy')
plt.xticks(xlocs, xlabs)
for bar in bars:
yval = bar.get_height()
plt.text(bar.get_x(), yval + .005, yval)
plt.show()
Solution 3:
Try:
plt.rcParams['xtick.bottom'] = plt.rcParams['xtick.labelbottom'] = False
plt.rcParams['xtick.top'] = plt.rcParams['xtick.labeltop'] = True
This makes it simple
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