使用本次研讨会提供的西雅图时间序列天气数据(weather.csv)作为时间序列原始数据进行数据预处理: 以下为每个数据的数据范围之外的异常数据,我们需要在表中每列数据里找出它们,并选择使用合适范围内的均值将它们进行替换。 编写Python程序实现数据处理方法。 提示:每个weather属性的正常范围和条件如下: 气压900 - 1200 降水量0 - 300 温度-50 -50 最大>=最小温度 风速(等级)0 - 10 风向0 - 360度
时间: 2023-03-30 07:02:33 浏览: 68
好的,我可以回答这个问题。对于每个属性,我们可以先找出数据范围之外的异常数据,然后使用合适范围内的均值将它们进行替换。具体实现方法可以参考以下Python代码:
```python
import pandas as pd
# 读取原始数据
data = pd.read_csv('weather.csv')
# 处理气压数据
pressure_mean = data[(data['pressure'] >= 900) & (data['pressure'] <= 120)]['pressure'].mean()
data.loc[data['pressure'] < 900, 'pressure'] = pressure_mean
data.loc[data['pressure'] > 120, 'pressure'] = pressure_mean
# 处理降水量数据
rain_mean = data[(data['rain'] >= ) & (data['rain'] <= 300)]['rain'].mean()
data.loc[data['rain'] < , 'rain'] = rain_mean
data.loc[data['rain'] > 300, 'rain'] = rain_mean
# 处理温度数据
temp_mean = data[(data['temp'] >= -50) & (data['temp'] <= 50)]['temp'].mean()
data.loc[data['temp'] < -50, 'temp'] = temp_mean
data.loc[data['temp'] > 50, 'temp'] = temp_mean
# 处理最大温度数据
max_temp_mean = data[(data['max_temp'] >= -50) & (data['max_temp'] <= 50) & (data['max_temp'] >= data['min_temp'])]['max_temp'].mean()
data.loc[(data['max_temp'] < -50) | (data['max_temp'] > 50) | (data['max_temp'] < data['min_temp']), 'max_temp'] = max_temp_mean
# 处理最小温度数据
min_temp_mean = data[(data['min_temp'] >= -50) & (data['min_temp'] <= 50) & (data['min_temp'] <= data['max_temp'])]['min_temp'].mean()
data.loc[(data['min_temp'] < -50) | (data['min_temp'] > 50) | (data['min_temp'] > data['max_temp']), 'min_temp'] = min_temp_mean
# 处理风速数据
wind_speed_mean = data[(data['wind_speed'] >= ) & (data['wind_speed'] <= 10)]['wind_speed'].mean()
data.loc[data['wind_speed'] < , 'wind_speed'] = wind_speed_mean
data.loc[data['wind_speed'] > 10, 'wind_speed'] = wind_speed_mean
# 处理风向数据
data.loc[data['wind_direction'] < , 'wind_direction'] =
data.loc[data['wind_direction'] > 360, 'wind_direction'] = 360
# 输出处理后的数据
print(data)
```
这段代码会读取weather.csv文件中的数据,然后分别处理每个属性的异常数据,最后输出处理后的数据。