使用matplotlib、numpy、xlwings和pandas绘制图标,给出完整实例和完整excel数据
时间: 2023-11-16 11:05:03 浏览: 126
以下是一个使用matplotlib、numpy、xlwings和pandas绘制图表的完整示例,以及一个包含完整数据的Excel文件。
首先,我们需要安装必要的Python库。在命令行中输入以下命令:
```
pip install matplotlib numpy xlwings pandas
```
接下来,我们将使用xlwings将Excel文件中的数据读取到Python中。我们可以使用以下代码:
```python
import xlwings as xw
import pandas as pd
# 打开Excel文件
wb = xw.Book('example.xlsx')
# 读取数据
data_range = wb.sheets['Sheet1'].range('A1:B6')
data = pd.DataFrame(data_range.value, columns=['x', 'y'])
```
现在,我们已经将Excel文件中的数据读取到了一个名为“data”的Pandas DataFrame中。
接下来,我们将使用numpy和matplotlib绘制一个简单的折线图,展示x和y的关系:
```python
import numpy as np
import matplotlib.pyplot as plt
# 把x和y的值分别保存为numpy数组
x = np.array(data['x'])
y = np.array(data['y'])
# 绘制折线图
plt.plot(x, y)
# 设置图表标题和坐标轴标签
plt.title('Example Plot')
plt.xlabel('X')
plt.ylabel('Y')
# 显示图表
plt.show()
```
这将创建一个简单的折线图,显示x和y的关系。
完整的代码如下:
```python
import xlwings as xw
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
# 打开Excel文件
wb = xw.Book('example.xlsx')
# 读取数据
data_range = wb.sheets['Sheet1'].range('A1:B6')
data = pd.DataFrame(data_range.value, columns=['x', 'y'])
# 把x和y的值分别保存为numpy数组
x = np.array(data['x'])
y = np.array(data['y'])
# 绘制折线图
plt.plot(x, y)
# 设置图表标题和坐标轴标签
plt.title('Example Plot')
plt.xlabel('X')
plt.ylabel('Y')
# 显示图表
plt.show()
```
Excel文件中的数据如下:
| x | y |
| --- | --- |
| 1 | 2 |
| 2 | 4 |
| 3 | 6 |
| 4 | 8 |
| 5 | 10 |
| 6 | 12 |
注意:在使用xlwings读取Excel数据时,要确保Excel文件已经关闭。
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