dataframe调用数据‘’
时间: 2024-09-29 13:11:11 浏览: 52
在Pandas库中,DataFrame是一种二维表格型的数据结构,非常适合存储和操作结构化数据。如果你想查看DataFrame中的数据,有几种常见的方式:
1. **显示前几行**:使用`head()`函数,默认显示5行,如果你想看更多,可以设置参数,如`df.head(n)`,`n`是你想要展示的行数。
```python
print(df.head()) # 显示前五行
```
2. **显示指定列**:如果你只想查看某一列或多列的数据,可以使用列名作为索引来选择,例如`df['column_name']`。
```python
column_data = df['column_name']
print(column_data)
```
3. **使用loc或iloc选择范围**:`loc`用于标签选择(基于行和列标签),而`iloc`用于位置选择(基于整数索引)。
```python
print(df.loc[0:3, 'column1':'column2']) # 查看第0到3行,'column1'和'column2'列的数据
```
4. **使用`.info()`** 获取关于DataFrame的基本信息,包括列名、非空值数量等。
```python
print(df.info())
```
5. **使用`.describe()`** 获取各列的统计摘要,如计数、平均值、标准差等。
```python
print(df.describe())
```
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