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How do I put a circle with annotation in matplotlib?
To put a circle with annotation in matplotlib, we can take the following steps −
- Set the figure size and adjust the padding between and around the subplots.
- Create data points using numpy.
- Get the point coordinate to put circle with annotation.
- Get the current axis.
- Plot the data and data points using plot() method.
- Set X and Y axes scale.
- To put a circled marker, use the plot() method with marker='o' and some properties.
- Annotate that circle (Step 7) with arrow style.
- To display the figure, use show() method.
Example
import matplotlib.pyplot as plt
import numpy as np
plt.rcParams["figure.figsize"] = [7.00, 3.50]
plt.rcParams["figure.autolayout"] = True
data = np.array([[5, 3, 4, 4, 6],
[1, 5, 3, 2, 2]])
point = data[:, 2]
ax = plt.gca()
ax.plot(data[0], data[1], 'o', ms=10, color='red')
ax.set_xlim([2, 8])
ax.set_ylim([0, 6])
radius = 15
ax.plot(point[0], point[1], 'o',
ms=radius * 2, mec='yellow', mfc='none', mew=2)
ax.annotate('Circled Marker', xy=point, xytext=(60, 60),
textcoords='offset points',
color='green', size='large',
arrowprops=dict(
arrowstyle='simple,tail_width=0.3,head_width=0.8,head_length=0.8',
facecolor='b', shrinkB=radius * 1.2)
)
plt.show()Output
It will produce the following output
Updated on: 19-Sep-2021
2K+ Views
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