pandas进行数据挖掘实战:二手车交易价格预测完整代码
时间: 2024-02-23 12:55:04 浏览: 19
当使用Pandas进行数据挖掘实战时,通常需要进行以下步骤:
1. 导入必要的库:
```python
import pandas as pd
import numpy as np
from sklearn.model_selection import train_test_split
from sklearn.linear_model import LinearRegression
from sklearn.metrics import mean_squared_error
```
2. 加载数据集:
```python
data = pd.read_csv('二手车交易数据.csv')
```
3. 数据预处理:
```python
# 删除不需要的列
data = data.drop(['列名1', '列名2'], axis=1)
# 处理缺失值
data = data.fillna(data.mean())
# 处理分类变量
data = pd.get_dummies(data, columns=['分类变量1', '分类变量2'])
# 特征选择
X = data.drop('目标变量', axis=1)
y = data['目标变量']
```
4. 划分训练集和测试集:
```python
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)
```
5. 构建模型并训练:
```python
model = LinearRegression()
model.fit(X_train, y_train)
```
6. 模型评估:
```python
y_pred = model.predict(X_test)
mse = mean_squared_error(y_test, y_pred)
```
完整代码如下:
```python
import pandas as pd
import numpy as np
from sklearn.model_selection import train_test_split
from sklearn.linear_model import LinearRegression
from sklearn.metrics import mean_squared_error
# 加载数据集
data = pd.read_csv('二手车交易数据.csv')
# 删除不需要的列
data = data.drop(['列名1', '列名2'], axis=1)
# 处理缺失值
data = data.fillna(data.mean())
# 处理分类变量
data = pd.get_dummies(data, columns=['分类变量1', '分类变量2'])
# 特征选择
X = data.drop('目标变量', axis=1)
y = data['目标变量']
# 划分训练集和测试集
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)
# 构建模型并训练
model = LinearRegression()
model.fit(X_train, y_train)
# 模型评估
y_pred = model.predict(X_test)
mse = mean_squared_error(y_test, y_pred)
print("均方误差:", mse)
```
希望以上代码能够帮助到你!如果你有任何其他问题,请随时提问。