python画出相关性热力图并保存白底高清图片
时间: 2023-09-09 21:09:55 浏览: 292
要实现这个任务,需要用到Python中的数据分析和可视化库,比如pandas、seaborn和matplotlib。具体步骤如下:
1. 导入所需的库
```python
import pandas as pd
import seaborn as sns
import matplotlib.pyplot as plt
```
2. 读取数据
```python
data = pd.read_csv('data.csv')
```
3. 计算相关系数
```python
corr = data.corr()
```
4. 使用seaborn绘制热力图
```python
sns.heatmap(corr, annot=True, cmap='coolwarm')
```
5. 设置图像参数
```python
plt.title('Correlation Heatmap')
plt.savefig('heatmap.png', dpi=300, bbox_inches='tight', pad_inches=0.5)
```
完整代码示例:
```python
import pandas as pd
import seaborn as sns
import matplotlib.pyplot as plt
# 读取数据
data = pd.read_csv('data.csv')
# 计算相关系数
corr = data.corr()
# 绘制热力图
sns.heatmap(corr, annot=True, cmap='coolwarm')
# 设置图像参数
plt.title('Correlation Heatmap')
plt.savefig('heatmap.png', dpi=300, bbox_inches='tight', pad_inches=0.5)
```
这样就可以生成白底高清的相关性热力图并保存为图片了。
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