(1)设置图例位置
使用loc参数
plt.legend(loc=‘lower left’)
| |
---|
0 | ‘best’ |
1 | ‘upper right’ |
2 | ‘upper left’ |
3 | ‘lower left’ |
4 | ‘lower right’ |
5 | ‘right’ |
6 | ‘center left’ |
7 | ‘center right’ |
8 | ‘lower center’ |
9 | ‘upper center’ |
10 | ‘center’ |
(2)设置图例字体
#设置字体大小
fontsize : int or float or {‘xx-small’, ‘x-small’, ‘small’, ‘medium’, ‘large’, ‘x-large’, ‘xx-large’}
(3)设置图例边框及背景
plt.legend(loc=‘best’,frameon=False) #去掉图例边框
plt.legend(loc=‘best’,edgecolor=‘blue’) #设置图例边框颜色
plt.legend(loc=‘best’,facecolor=‘blue’) #设置图例背景颜色,若无边框,参数无效
(4)设置图例标题
plt.legend(loc=‘best’,title=‘figure 1 legend’) #去掉图例边框
- 案例:设置图例legend到图形边界外
box = ax1.get_position()
ax1.set_position([box.x0, box.y0, box.width , box.height* 0.8])
ax1.legend(loc='center', bbox_to_anchor=(0.5, 1.2),ncol=3)
- 案例:显示多图例legend
import matplotlib.pyplot as plt
import numpy as np
x = np.random.uniform(-1, 1, 4)
y = np.random.uniform(-1, 1, 4)
p1, = plt.plot([1,2,3])
p2, = plt.plot([3,2,1])
l1 = plt.legend([p2, p1], ["line 2", "line 1"], loc='upper left')
p3 = plt.scatter(x[0:2], y[0:2], marker = 'D', color='r')
p4 = plt.scatter(x[2:], y[2:], marker = 'D', color='g')
plt.legend([p3, p4], ['label', 'label1'], loc='lower right', scatterpoints=1)
plt.gca().add_artist(l1)
3. 案例:
import matplotlib.pyplot as plt
line1, = plt.plot([1,2,3], label="Line 1", linestyle='--')
line2, = plt.plot([3,2,1], label="Line 2", linewidth=4)
first_legend = plt.legend(handles=[line1], loc=1)
ax = plt.gca().add_artist(first_legend)
plt.legend(handles=[line2], loc=4)
plt.show()
原文链接https://blog.csdn.net/helunqu2017/article/details/78641290,感谢作者辛勤付出,仅作笔记使用,侵删