帮我写一个利用XGboost模型预报电离层TEC的代码
时间: 2023-06-25 08:05:00 浏览: 93
XgBoost算法python代码编写
好的,以下是一个简单的利用XGBoost模型预报电离层TEC的代码。
首先,需要导入必要的库和数据集:
```python
import pandas as pd
import numpy as np
import xgboost as xgb
from sklearn.model_selection import train_test_split
# 读取数据集
data = pd.read_csv('data.csv')
```
然后,需要将数据集分为训练集和测试集,并将输入和输出变量分开:
```python
# 将输入和输出变量分开
X = data.drop(['TEC'], axis=1)
y = data['TEC']
# 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)
```
接下来,需要定义XGBoost模型并对其进行训练:
```python
# 定义XGBoost模型
xgb_model = xgb.XGBRegressor(objective='reg:squarederror', n_estimators=500, max_depth=3, learning_rate=0.1)
# 训练模型
xgb_model.fit(X_train, y_train)
```
最后,可以使用训练好的模型预测测试集上的TEC值,并计算模型的性能指标:
```python
# 在测试集上进行预测
y_pred = xgb_model.predict(X_test)
# 计算模型的性能指标
from sklearn.metrics import mean_squared_error, r2_score
print('均方误差:', mean_squared_error(y_test, y_pred))
print('R2得分:', r2_score(y_test, y_pred))
```
完整代码如下:
```python
import pandas as pd
import numpy as np
import xgboost as xgb
from sklearn.model_selection import train_test_split
# 读取数据集
data = pd.read_csv('data.csv')
# 将输入和输出变量分开
X = data.drop(['TEC'], axis=1)
y = data['TEC']
# 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)
# 定义XGBoost模型
xgb_model = xgb.XGBRegressor(objective='reg:squarederror', n_estimators=500, max_depth=3, learning_rate=0.1)
# 训练模型
xgb_model.fit(X_train, y_train)
# 在测试集上进行预测
y_pred = xgb_model.predict(X_test)
# 计算模型的性能指标
from sklearn.metrics import mean_squared_error, r2_score
print('均方误差:', mean_squared_error(y_test, y_pred))
print('R2得分:', r2_score(y_test, y_pred))
```
希望对你有帮助!
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