plt imshow hot 如何设置背景为黑色
时间: 2023-10-18 22:54:16 浏览: 165
python matplotlib imshow热图坐标替换/映射实例
要将plt.imshow()的背景设置为黑色,可以使用参数cmap='hot'来指定热图的颜色映射。然后,使用参数vmin和vmax来设置颜色映射的范围,使得最小值对应黑色。具体代码如下所示:
```python
import matplotlib.pyplot as plt
X = \[\[1, 2\], \[3, 4\], \[5, 6\]\]
plt.imshow(X, cmap='hot', vmin=0, vmax=6)
plt.colorbar()
plt.show()
```
在这个例子中,我们使用了热图的颜色映射'hot',并将最小值设置为0,最大值设置为6,这样最小值对应的颜色就是黑色。
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