matplotlib使用注意事项
时间: 2023-11-20 22:57:07 浏览: 139
以下是使用Matplotlib绘图时需要注意的几点:
1.如果统计图中包含中文,需要设置字体,否则会出现乱码。可以使用以下代码设置字体:
```python
import matplotlib.pyplot as plt
plt.rcParams['font.sans-serif'] = ['SimHei'] # 设置中文显示
plt.rcParams['axes.unicode_minus'] = False # 解决负号'-'显示为方块的问题
```
2.如果需要在服务器上生成图像,可以使用以下代码将Matplotlib的后端设置为Agg:
```python
import matplotlib
matplotlib.use('Agg')
```
3.可以使用plt.style.use()函数设置图像的样式,例如使用ggplot风格绘图:
```python
import matplotlib.pyplot as plt
plt.style.use('ggplot')
```
4.可以使用plt.rcParams[]函数设置图像的质量和分辨率,例如:
```python
import matplotlib.pyplot as plt
plt.rcParams['figure.figsize'] = (6.0, 4.02) # 图片大小
plt.rcParams['savefig.dpi'] = 600 # 图片像素
plt.rcParams['figure.dpi'] = 600 # 分辨率
```
5.可以使用plt.savefig()函数保存图像,并去除多余的白边:
```python
import matplotlib.pyplot as plt
plt.savefig(save_path, bbox_inches='tight',pad_inches=0)
```
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